12 CRR-NY 800.5NY-CRR

STATE COMPILATION OF CODES, RULES AND REGULATIONS OF THE STATE OF NEW YORK
TITLE 12. DEPARTMENT OF LABOR
CHAPTER XI. DIVISION OF SAFETY AND HEALTH
SUBCHAPTER A. PUBLIC EMPLOYEES' SAFETY AND HEALTH
PART 800. PUBLIC EMPLOYEES' OCCUPATIONAL SAFETY AND HEALTH STANDARDS
12 CRR-NY 800.5
12 CRR-NY 800.5
800.5 Possible exposure limits.
An employee's exposure to any substance listed in Table Z-1-A, Z-2, or Z-3 of this section shall be limited in accordance with the requirements of the following paragraphs of this section.
(a) Table Z-1-A.
(1) Substances in transitional limits columns with limits preceded by “ C”—ceiling values. An employee's exposure to any substance in Table Z-1-A under the transitional limits column, the exposure limit of which is preceded by a “C”, shall at no time exceed the exposure limit given for that material in Table Z-1-A under the transitional limits columns.
(2) Other substances in transitional limits columns—8-hour time weighted average. An employee's exposure to any substance in table Z-1-A under the transitional limits columns, the exposure limit of which is not preceded by a “C”, shall not exceed the 8-hour time weighted average given for that substance in table Z-1-A under the transitional limits columns in any 8-hour work shift of a 40-hour work week.
(3) Final rule limits columns. An employee's exposure to any substance listed in table Z-1-A shall not exceed the time weighted average (TWA), short term exposure limit (STEL), and ceiling limit specified for that substance in table Z-1-A under the final limits columns.
(4) Skin designation. To prevent or reduce skin absorption, an employee's skin exposure to substances listed in table Z-1-A with an “X” in one or both of the skin designation columns following the substance name shall be prevented or reduced to the extent necessary in the circumstances through the use of gloves, coveralls, goggles, or other appropriate personal protective equipment, engineering controls or work practices.
(5) Definitions. The following definitions are applicable to the final rule limits columns of table Z-1-A:
(i) Time weighted average (TWA) is the employee's average airborne exposure in any 8-hour work shift of a 40-hour work week which shall not be exceeded.
(ii) Short term exposure limit (STEL) is the employee's 15-minute time weighted average exposure which shall not be exceeded at any time during a work day unless another time limit is specified in a parenthetical notation below the limit. If another time period is specified, the time weighted average exposure over that time period shall not be exceeded at any time during the working day.
(iii) Ceiling is the employee's exposure which shall not be exceeded during any part of the work day. If instantaneous monitoring is not feasible, then the ceiling shall be assessed as a 15-minute time weighted average exposure which shall not be exceeded at any time over a working day.
(6) Additional definition. The terms substance, air contaminant,and material are equivalent in meaning for 29 CFR 1910.1000. (29 CFR 1910 was previously filed with the Secretary of State on February 2, 1988, under File Number 240. It is available for inspection at the NYS Department of State and the NYS Department of Labor, and can be obtained from the U.S. Government Printing Office in Federal Register, Volume 52, No. 176, pp. 34460-34578, September 11, 1987).
(b) Table Z-2. Table Z-2 is applicable for the transitional period and to the extent set forth in subdivision (f) of this section.
(1) Eight-hour time weighted averages. An employee's exposure to any material listed in table Z-2, in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average limit given for that material in table Z-2.
(2) Acceptable ceiling concentrations. An employee's exposure to a material listed in table Z-2 shall not exceed at any time during an 8-hour shift the acceptable ceiling concentration limit given for the material in the table, except for a time period, and up to a concentration not exceeding the maximum duration and concentration allowed in the column under “acceptable maximum peak above the acceptable ceiling concentration for an 8-hour shift”.
(3) Example. During an 8-hour work shift, an employee may be exposed to a concentration of Substance A (with a 10 ppm TWA, 25 ppm ceiling and 50 ppm peak) above 25 ppm (but never above 50 ppm) only for a maximum period of 10 minutes. Such exposure must be compensated by exposures to concentrations less than 10 ppm so that the cumulative exposure for the entire 8-hour work shift does not exceed a weighted average of 10 ppm.
(c) Table Z-3.
Table Z-3 is applicable for the transitional period and to the extent set forth in subdivision (f) of this section. An employee's exposure to any substance listed in table Z-3, in any 8-hour work shift of a 40-hour work week shall not exceed the 8-hour time weighted average limit given for that substance in the table.
(d) Computation formulae.
The computation formula which shall apply to employee exposure to more than one substance for which 8-hour time weighted averages are listed in subpart Z of 29 CFR part 1910 in order to determine whether an employee is exposed over the regulatory limit is as follows:
(1)
(i) The cumulative exposure for an 8-hour work shift shall be computed as follows:
(E = C(a) T(a) + C(b) T(b) + . . . . C(n) T(n)) divided by 8
Where:
E is the equivalent exposure for the working shift.
C is the concentration during any period of time T where the concentration remains constant.
T is the duration in hours of the exposure at the concentration C.
The value of E shall not exceed the 8-hour time weighted average specified in Subpart Z or 29 CFR part 1910 for the material involved.
(ii) To illustrate the formula prescribed in subparagraph (i) of this paragraph, assume that Substance A has an 8-hour time weighted average limit of 100 ppm noted in table Z-1-A. Assume than an employee is subject to the following exposure: Substituting this information in the formula, we have
Two hours exposure at 150 p/m
Two hours exposure at 75 p/m
Four hours exposure at 50 p/m
(2 × 150 + 2 × 75 + 4 × 50) divided by 8 = 81.25 p/m
Since 81.25 p.p.m. is less than 100 p.p.m., the 8-hour time weighted average limit, the exposure is acceptable.
(2)
(i) In case of a mixture of air contaminants an employer shall compute the equivalent exposure as follows:
E(m) = (C(1) divided by L(1) + C(2) divided by L(2)) + . . . (C)(n) divided by L(n))
Where:
E(m) is the equivalent exposure for the mixture.
C is the concentration of a particular contaminant.
L is the exposure limit for that substance specified in Subpart Z of 29 CFR part 1910.
The value of E(m) shall not exceed unity (1).
(ii) To illustrate the formula prescribed in subparagraph (d)(2)(i) of this section, consider the following exposures:
SubstanceActual concentration of 8-hour exposure (ppm)8 hr.TWA PEL (ppm)
B
 
5001,000
C
 
45200
D
 
40200
Substituting in the formula, we have: E(m) = 500 divided by 1,000 + 45 divided by 200 + 40 divided by 200 E(m) = 0.500 + 0.225 + 0.200 E(m) = 0.925
Since E(m) is less than unity (1), the exposure combination is within acceptable limits.
(e) To achieve compliance with subdivisions (a) through (d) of this section, administrative or engineering controls must first be determined and implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or any other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in this section. Any equipment and/or technical measures used for this purpose must be approved for each particular use by a competent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with 1910.134.
(f) Effective dates, start-up dates and transitional provisions.
(1) Effective date. The effective date for the permissible exposure limits specified in the final rule limits columns of table Z-1-A is March 1, 1989.
(2)
(i) The permissible exposure limits specified in the final rule columns of table Z-1-A shall be achieved by any reasonable combination of engineering controls, work practices and personal protective equipment effective September 1, 1989, through December 30, 1992. (See note at end of table Z-1-A).
(ii)
(a) The permissible exposure limits specified in the final rule limits columns of table Z-1-A shall be achieved by the method of compliance specified in subdivision (e) of this section effective December 31, 1992, if by December 31, 1991, a final rule has been published in the Federal Register amending or determining not to amend subdivision (e) of this section.
(b) If no final rule has been published in the Federal Register by December 31, 1991, amending or determining not to amend subdivision (e) of this section, then the permissible limits specified in the final rule limits columns of table Z-1-A shall be achieved by the methods of compliance specified by subdivision (e) of this section effective December 31, 1993, and subparagraph (f)(2)(i) of this section shall remain in effect through December 30, 1993.
(iii) The skin designations in the final rule limits columns become effective September 1, 1989. The skin designations in the transitional limits columns are in effect from March 1, 1989, through August 31, 1989.
(3) Transitional provisions.
(i) The permissible exposure limits specified in the transitional limits columns of table Z-1-A, table Z-2 and table Z-3 shall continue to be achieved by the methods of compliance specified in subdivision (e) of this section through December 30, 1992. If clause (2)(ii)(b) of this subdivision takes effect, this provision is extended through December 30, 1993. The permissible exposure limits specified in tables Z-2 and Z-3 for substances mentioned in the final rule limits column of table Z-1-A only by cross reference to table Z-2 or Z-3 shall remain in effect indefinitely and continue to be achieved by the methods of compliance specified in subdivision (e) of this section.
(ii) The permissible exposure limits specified in the transitional limits columns of table Z-1-A, Z-2 and Z-3 shall be applicable to the extent cross referenced in 29 CFR parts 1915, 1917 and 1918.
(iii) If any new or amended provisions or new or revised limits for any substance or substances are either administratively stayed or judicially stayed or vacated, then the existing provisions or limits for those substances specified in the transitional limits columns of table Z-1-A, table Z-2 or table Z-3 shall remain in effect until such stay is lifted, or indefinitely, if the limit is vacated.
(4) Enforcement of the limits are indefinitely stayed for: aluminum alkyls; ethylidene norbornene; hexafluoracetone; mercury (alkyl compounds); oxygen difluoride; phenylphosphine; and sulfur pentafluoride; until OSHA publishes in the Federal Register a notice that a sampling and analytical technique is available.
TABLE Z-1-A. LIMITS FOR AIR CONTAMINANTS
NOTE: Footnotes specfic only to a limited number of substances are also shown within the table.
* The transitional PELs are 8-hour TWAs unless otherwise noted; a (C) designation denotes a celing limit.
** Unless otherwise noted, employers in General Industry (i.e., those covered by 29 CFR 1910) may use any combination of controls to achieve these limits until December 31, 1993 as set forth in 29 CFR 1910.1000(f).
*** As determined from breathing-zone air samples;
a Parts of vapor or gas per million parts of contaminated air by volume at 25 degrees C and 760 torr.
b Milligrams of substance per cubic meter of air. When a numerical entry for a substance is in the mg/m(3) column and not in the ppm column, then the number in the mg/m(3) is exact. When numerical entries for a substance are in both the ppm and mg/m(3) columns, then the number in the ppm column is exact and the number in the mg/m(3) column may be rounded off.
c Duration is for 15 minutes, unless otherwise noted.
d The final benzene standard in 1910.1028 applies to all occupational exposures to benzene except some subsegments of industry where exposures are consistently under the action level (i.e., distribution and sale of fuels, sealed containers and pipelines, coke production, oil and gas drilling and production, natural gas processing, and the percentage exclusion for liquid mixtures); for the excepted subsegment, the benzene limits in table Z-2 apply.
e Exposures under 10,000 ppm ato be cited de minimus.
f The CAS number is for information only. Enforcement is based on the substance name. For an entry covering more than one metal compound measured as the metal, the CAS number for the metal is given-not CAS numbers for the individual compounds.
g Compliance with the subtilisins PEL is assessed by sampling with a high volume sampler (600-800 liters per minute) for at least 60 minutes.
h The Acetone STEL does not apply to the cellulose acetate fiber industry. It is in effect for all other sectors.
i The final rule limit STEL of 5 mg/m(3) is not in effect as a result of reconsideration. Calcium hydroxide is covered by the exposure limits for particulates not otherwise regulated of 5 mg/m(3) respirable dust and 5 mg/m(3) total dust.
j The final rule limit TWA of 5 mg/m(3) is not in effect as a result of reconsideration. The calcium oxide transitional limit of 5 mg/m(3) remains in effect and employee exposures shall be kept below that level pursuant to the methods of compliance specified in CFR 1910.1000(e).
k The final rule limit STEL of 0.1 mg/m(3) is not in effect as a result of reconsideration for the industrial sector of civilian manufacture and distribution of explosives and propellants for civilian use. The final rule limits skin designation and the transitional limits ceiling limit of 1 mg/m(3) remain in effect for this sector until completion to the reconsideration.
l The final rule limit STEL of 0.1 mg/m(3) is not in effect as a result of reconsideration for the industrial sector of civilian manufacture and distribution of explosives and propellants for civilian use. The final rule limits skin designation and the transitional limits ceiling limit of 2 mg/m(3) remain in effect for this sector until completion of the reconsideration.
m Sampling for the carbon monoxide ceiling shall be averaged over 5 minutes but an instantaneous reading over 1500 ppm shall not be exceeded.
AcetaldehydeCAS NO (f): 75-07-0
Transitional Limits:
PEL*200 ppm(a)360 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm (a)180 mg/m(3)(b)
STEL(c)150 ppm (a)270 mg/m(3)(b)
CEILING--
Skin Designation-
Acetetic acidCAS NO(f): 64-19-7
Transitional Limits:
PEL*10 ppm (a)25 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm (a)25 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Acetic anhydrideCAS NO(f): 108-24-7
Transitional Limits:
PEL*5 ppm(a)20 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING5 ppm(a)20 mg/m(3)(b)
Skin Designation-
Acetone (h)CAS NO(f):67-64-1
Transitional Limits:
PEL*1000 ppm(a)2400 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA750 ppm (a)1800 mg/m(3)(b)
STEL(c)1000 ppm (a) (h)2400 mg/m(3)(b) (h)
CEILING--
Skin Designation-
Footnote (h) The Acetone STEL does not apply to the cellulose acetate fiber industry. It is in effect for all other sectors.
Acetonitrile*CAS NO(f):75-05-8
Transitional Limits:
PEL*40 ppm(a)70 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA40 ppm(a)70 mg/m(3)(b)
STEL(c)60 ppm (a)105 mg/m(3)(b)
CEILING--
Skin Designation-
2-Acetylaminofluorine;CAS NO(f): 53-96-3
see 1910.1014
Acetylene dichloride;
see 1, 1-Dichloroethylene
Acetylene tetrabromideCAS NO(f):79-27-6
Transitional Limits:
PEL*1 ppm (a)14 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)14 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Acetylsalicylic acid (Aspirin)CAS NO(f):50-78-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
AcroleinCAS NO(f):107-02-8
Transitional Limits:
PEL*0.1 ppm(a)0.25 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.25 mg/m(3)(b)
STEL(c)0.3 ppm(a)0.8 mg/m(3)(b)
CEILING--
Skin Designation-
AcrylamideCAS NO(f):79-06-1
Transitional Limits:
PEL*-0.3 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.03 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Acrylic acidCAS NO(f):79-10-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)30 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Acrylonitrile;CAS NO(f): 107-13-1
see 1910.1045
AldrinCAS NO(f):309-00-2
Transitional Limits:
PEL*-0.25 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.25 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Allyl alcoholCAS NO(f):107-18-6
Transitional Limits:
PEL*2 ppm(a)5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA2 ppm(a)5 mg/m(3)(b)
STEL(c)4 ppm(a)10 mg/m(3)(b)
CEILING--
Skin DesignationX
Allyl chlorideCAS NO(f):107-05-1
Transitional Limits:
PEL*1 ppm(a)3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)3 mg/m(3)(b)
STEL(c)2 ppm(a)6 mg/m(3)(b)
CEILING--
Skin Designation-
Allyl glycidyl ether (AGE)CAS NO(f):106-92-3
Transitional Limits:
PEL*(C) 10 ppm(a)(C) 45 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)22 mg/m(3)(b)
STEL(c)10 ppm(a)44 mg/m(3)(b)
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Allyl propyl disulfideCAS NO(f):2179-59-1
Transitional Limits:
PEL*2 ppm(a)12 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)12 mg/m(3)(b)
STEL(c)3 ppm(a)18 mg/m(3)(b)
CEILING--
Skin Designation-
alpha-AluminaCAS NO(f):1344-28-1
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Aluminum (as Al) MetalCAS NO (f): 7429-90-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Pyro Powders
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Welding Fumes***
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Footnote*** As determined from breathing-zone air samples.
Soluble Salts
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Alkyls
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
4-Aminodiphenyl;CAS NO(f):92-67-1
see 1910.1011
2-Aminoethanol;
see Ethanolamine
2-AminopyridineCAS NO(f):504-29-0
Transitional Limits:
PEL*0.5 ppm(a)2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
AmitroleCAS NO(f):61-82-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
AmmoniaCAS NO(f):7664-41-7
Transitional Limits:
PEL*50 ppm(a)35 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)35 ppm(a)27 mg/m(3)(b)
CEILING--
Skin Designation-
Ammonium chloride fumeCAS NO(f):12125-02-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c) 20 mg/m(3)(b)
CEILING--
Skin Designation-
Ammonium sulfamateCAS NO(f):7773-06-0
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c) 20 mg/m(3)(b)
CEILING--
Skin Designation-
n-Amyl acetateCAS NO(f): 628-63-7
Transitional Limits:
PEL*100 ppm(a)525 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)525 mg/m(3)(b)
STEL(c) 20 mg/m(3)(b)
CEILING--
Skin Designation-
sec-Amyl acetateCAS NO(f): 626-38-0
Transitional Limits:
PEL*125 ppm(a)650 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA125 ppm(a)650 mg/m(3)(b)
STEL(c) 20 mg/m(3)(b)
CEILING--
Skin Designation-
Aniline and homologsCAS NO(f): 62-53-3
Transitional Limits:
PEL*5 ppm(a)19 mg/m(3)(b)
Skin Designation2X
Final Rule Limits**:
TWA ppm(a)8 mg/m(3)(b)
STEL(c) 20 mg/m(3)(b)
CEILING--
Skin DesignationX
Anisidine (o-,p-isomers)CAS NO(f):29191-52-4
Transitional Limits:
PEL* 0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Antimony and compounds (as Sb)CAS NO(f):7440-36-0
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ANTU (alpha Naphthylthiourea)CAS NO(f):86-88-4
Transitional Limits:
PEL*-0.3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Arsenic, organic compounds (as As)CAS NO(f):7440-38-2
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Arsenic, inorganic compounds (as As);
see 1910.1018
ArsineCAS NO(f):7784-42-1
Transitional Limits:
PEL*0.05 ppm(a)0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.05 ppm(a)0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
AsbestosCAS NO (f): Varies
see 1910.1001 and 1910.1101
AtrazineCAS NO(f):1912-24-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Azinphos-metylCAS NO(f):86-50-0
Transitional Limits:
PEL*-0.2 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Barium, soluble compounds (as Ba)CAS NO(f):7440-39-3
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Barium sulfateCAS NO(f):7727-43-7
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
BenomylCAS NO(f):17804-35-2
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
BenzeneCAS NO(f):71-43-2
see 1910.1028
See Table Z-2 for the limits applicable in the operations or sectors excluded in 1910.1028(d) Footnote (d) The final benzene standard in 1910.1028 applies to all occupational exposures to benzene except some subsegments of industry where exposures are consistently under the action level (i.e., distribution and sale of fuels, sealed containers and pipelines, coke production, oil and gas drilling and production, natural gas processing, and the percentage exclusion for liquid mixtures); for the excepted subsegments, the benzene limits in Table Z-2 apply.
BenzidineCAS NO(f):92-87-5
see 1910.1010
p-Benzoquinone;
see Quinone
Benzo (a) pyrene;
see Coal tar pitch volatiles
Benzoyl peroxideCAS NO(f):94-36-0
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Benzyl chlorideCAS NO(f):100-44-7
Transitional Limits:
PEL*1 ppm(a)5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Beryllium and beryllium compounds
(as Be)CAS NO(f):7440-41-7
Transitional Limits:
PEL*Tbl. Z-2-
Skin Designation-
Final Rule Limits**:
TWATbl. Z-2Tbl. Z-2
STEL(c)Tbl. Z-2
CEILING--
Skin Designation-
Biphenyl;
see Diphenyl
Bismuth telluride, UndopedCAS NO(f):1304-82-1
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Bismuth telluride, Se-doped
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Borates, tetra, sodium salts
AnhydrousCAS NO (f): 1330-43-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DecahydrateCAS NO(f):1303-96-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m (3) (b)
STEL(c)--
CEILING--
Skin Designation-
PentahydrateCAS NO(f):12179-04-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Boron oxideCAS NO(f):1303-86-2
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Boron tribromideCAS NO(f):10294-33-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING1 ppm(a)10 mg/m(3)(b)
Skin Designation-
Boron trifluorideCAS NO(f):7637-07-2
Transitional Limits:
PEL*(C) 1 ppm(a)(C) 3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING1 ppm(a)3 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
BromacilCAS NO(f):314-40-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
BromineCAS NO(f):7726-95-6
Transitional Limits:
PEL*0.1 ppm(a)0.7 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.7 mg/m(3)(b)
STEL(c)0.3 ppm(a)2 mg/m(3)(b)
CEILING--
Skin Designation-
Bromine pentafluorideCAS NO(f):7789-30-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.7 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
BromoformCAS NO(f):75-25-2
Transitional Limits:
PEL*0.5 ppm(a)5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.5 ppm(a)5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Butadiene (1,3-Butadiene)CAS NO(f):106-99-0
Transitional Limits:
PEL*1000 ppm(a)2200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)2200 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ButaneCAS NO(f):106-97-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA800 ppm(a)1900 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Butanethiol;
see Butyl mercaptan
2-Butanone (Methyl ethyl ketone)CAS NO(f):78-93-3
Transitional Limits:
PEL*200 ppm(a)590 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)590 mg/m(3)(b)
STEL(c)300 ppm(a)885 mg/m(3)(b)
CEILING--
Skin Designation-
2-ButoxyethanolCAS NO(f):111-76-2
Transitional Limits:
PEL*50 ppm(a)240 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA25 ppm(a)120 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
n-Butyl-acetateCAS NO(f):123-86-4
Transitional Limits:
PEL*150 ppm(a)710 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA150 ppm(a)710 mg/m(3)(b)
STEL(c)200 ppm(a)950 mg/m(3)(b)
CEILING--
Skin Designation-
sec-Butyl acetateCAS NO(f):105-46-4
Transitional Limits:
PEL*200 ppm(a)950 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)950 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
tert-Butyl-acetateCAS NO(f):540-88-5
Transitional Limits:
PEL*200 ppm(a)950 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm (a)950 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Butyl acrylateCAS NO(f):141-32-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)55 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
n-Butyl alcoholCAS NO(f):71-36-3
Transitional Limits:
PEL*100 ppm(a)300 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING50 ppm(a)150 mg/m(3)(b)
Skin DesignationX
sec-Butyl alcoholCAS NO(f):78-92-2
Transitional Limits:
PEL*150 ppm(a)450 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)305 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
tert-Butyl alcoholCAS NO(f):75-65-0
Transitional Limits:
PEL*100 ppm(a)300 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)300 mg/m(3)(b)
STEL(c)150 ppm(a)450 mg/m(3)(b)
CEILING--
Skin Designation-
ButylamineCAS NO (f): 109-73-9
Transitional Limits:
PEL*(C) 5 ppm(a)(C) 15 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)--
CEILING5 ppm(a)15 mg/m(3)(b)
Skin DesignationX
Footnote (C) denotes a ceiling limit.
tert-Butyl chromate (as CrO (3))CAS NO(f):1189-85-1
Transitional Limits:
PEL*-(C) 0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)--
CEILING 0.1 mg/m(3)(b)
Skin DesignationX
Footnote (C) denotes a ceiling limit.
n-Butyl glycidyl ether (BGE)CAS NO(f):2426-08-6
Transitional Limits:
PEL*50 ppm(a)270 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)135 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
n-Butyl lactateCAS NO(f):138-22-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)25 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Butyl mercaptanCAS NO(f):109-79-5
Transitional Limits:
PEL*10 ppm(a)35 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)1.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
o-sec-ButylphenolCAS NO(f):89-72-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)30 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
p-tert-ButyltolueneCAS NO(f):98-51-1
Transitional Limits:
PEL*10 ppm(a)60 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)60 mg/m(3)(b)
STEL(c)20 ppm(a)120 mg/m(3)(b)
CEILING--
Skin Designation-
* Cadmium fume (as Cd)CAS NO(f): 7440-43-9
(This entire line has been replaced per 57 FR 42388, Sept. 14, 1992 by the following):
Cadmium; see 1910.1027. See Table Z-2 for the exposure limits for any operations or sectors where the exposure limits in 1910.1027 are stayed or otherwise not in effect.
Cadmium dust (as Cd)CAS NO(f): 7440-43-9
(This entire line has been replaced per 57 FR 42388, Sept. 14, 1992 by the following):
Cadmium; see 1910.1027. See Table Z-2 for the exposure limits for any operations or sectors where the exposure limits in 1910.1027 are stayed or otherwise not in effect.
Calcium CarbonateCAS NO(f):1317-65-3
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Calcium cyanamideCAS NO(f):156-62-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Calcium hydroxide (i)CAS NO(f):1305-62-0
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)(i)
STEL(c)--
CEILING--
Skin Designation-
Footnote (i) The Final Rule Limit of 5 mg/m(3) is not in effect as a result of reconsideration.
Calcium hydroxide is covered by the exposure limits for particulates not otherwise regulated of 5 mg/m(3) respirable dust and 5 mg/m(3) total dust.
Calcium oxide (j)CAS NO(f):1305-78-8
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)(j)
STEL(c)--
CEILING--
Skin Designation-
Footnote (j) The Final Rule Limit TWA of 5 mg/m(3) is not in effect as a result of reconsideration.
The calcium oxide Transitional Limit of 5 mg/m(3) remains in effect and employee exposures shall be kept below that level pursuant to the methods of compliance specified in 29 CFR 1910.1000(e).
Calcium SilicateCAS NO(f):1344-95-2
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Calcium sulfateCAS NO(f):7778-18-9
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Camphor, syntheticCAS NO(f):76-22-2
Transitional Limits:
PEL*-2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CaprolactamCAS NO(f):105-60-2
Dust
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c) 3 mg/m(3)(b)
CEILING--
Skin Designation-
Vapor
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)10 ppm(a)40 mg/m(3)(b)
CEILING--
Skin Designation-
Captafol (Difolatan (R))CAS NO(f): 2425-06-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CaptanCAS NO(f): 133-06-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Carbaryl (Sevin (R))CAS NO(f): 63-25-2
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Carbofuran (Furadan (R))CAS NO(f): 1563-66-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Carbon blackCAS NO(f): 1333-86-4
Transitional Limits:
PEL*-3.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-3.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Carbon dioxideCAS NO(f): 124-38-9
Transitional Limits:
PEL*5000(e) ppm(a)9,000 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10,000 ppm(a)18,000 mg/m(3)(b)
STEL(c)30,000 ppm(a)54,000 mg/m(3)(b)
CEILING--
Skin Designation-
Footnote (e) Exposures under 10,000 ppm to be cited de minimus.
Carbon disulfideCAS NO(f): 75-15-0
Transitional Limits:
PEL*Tbl. Z-2
Final Rule Limits**:
TWA4 ppm(a)12 mg/m(3)(b)
STEL(c)12 ppm(a)36 mg/m(3)(b)
CEILING--
Skin DesignationX
Carbon monoxideCAS NO(f): 630-08-0
Transitional Limits:
PEL*50 ppm(a)55 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA35 ppm(a)40 mg/m(3)(b)
STEL(c)--
CEILING200 ppm(a)(m)229 mg/m(3)(b)(m)
Skin Designation-
Note: Stayed CEILING for blast furnace operations, vessel blowing at basic oxygen furnaces and sinter plants in the steel industry (SIC 33), termination pending (FR 55: 3724, 2/5/90)
Footnote (m) Sampling for the carbon monoxide ceiling shall be averaged over 5 minutes but an instantaneous reading over 1500 ppm shall not be exceeded.
Carbon tetrabromideCAS NO(f): 558-13-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)1.4 mg/m(3)(b)
STEL(c)0.3 ppm(a)4 mg/m(3)(b)
CEILING--
Skin Designation-
Carbon tetrachlorideCAS NO(f): 56-23-5
Transitional Limits:
PEL*Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)12.6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Carbonyl fluorideCAS NO(f): 353-50-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)5 mg/m(3)(b)
STEL(c)5 ppm(a)15 mg/m(3)(b)
CEILING--
Skin Designation-
Catechol (Pyrocatechol)CAS NO(f): 120-80-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
CelluloseCAS NO(f): 9004-34-6
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cesium hydroxideCAS NO(f): 21351-79-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ChlordaneCAS NO(f): 57-74-9
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)--
CEILING--
Skin DesignationX
Chlorinated campheneCAS NO(f): 8001-35-2
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c) 1 mg/m(3)(b)
CEILING--
Skin DesignationX
Chlorinated diphenyl oxideCAS NO(f): 55720-99-5
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ChlorineCAS NO(f): 7782-50-5
Transitional Limits:
PEL*(C) 1 ppm(a)(C) 3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)1.5 mg/m(3)(b)
STEL(c)1 ppm(a)3 mg/m(3)(b)
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Chlorine dioxideCAS NO(f): 10049-04-4
Transitional Limits:
PEL*0.1 ppm(a)0.3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.3 mg/m(3)(b)
STEL(c)0.3 ppm(a)0.9 mg/m(3)(b)
CEILING--
Skin Designation-
Chlorine trifluorideCAS NO(f): 7790-91-2
Transitional Limits:
PEL*(C) 0.1 ppm(a)(C) 0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.1 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
ChloroacetaldehydeCAS NO(f): 107-20-0
Transitional Limits:
PEL*(C) 1 ppm(a)(C) 3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING1 ppm(a)3 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
a-Chloroacetophenone (Phenacyl chloride)CAS NO(f): 532-27-4
Transitional Limits:
PEL*0.05 ppm(a)0.3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.05 ppm(a)0.3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Chloroacetyl chlorideCAS NO(f): 79-04-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.05 ppm(a)0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ChlorobenzeneCAS NO(f): 108-90-7
Transitional Limits:
PEL*75 ppm(a)350 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA75 ppm(a)350 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
o-Chlorobenzylidene malononitrileCAS NO(f): 2698-41-1
Transitional Limits:
PEL*0.05 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.05 ppm(a)0.4 mg/m(3)(b)
Skin DesignationX
ChlorobromomethaneCAS NO(f): 74-97-5
Transitional Limits:
PEL*200 ppm(a)1050 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)1050 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
2-Chloro-1,3-butadiene;
see b-Chloroprene
ChlorodifluoromethaneCAS NO(f): 75-45-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)3500 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Chlorodiphenyl (42% Chlorine) (PCB)CAS NO(f): 53469-21-9
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Chlorodiphenyl (54% Chlorine) (PCB)CAS NO(f): 11097-69-1
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
1-Chloro, 2,3-epoxypropane;
see Epichlorohydrin
2-Chloroethanol;
see Ethylene chlorohydrin
Chloroethylene;
see Vinyl chloride
Chloroform (Trichloromethane)CAS NO(f): 67-66-3
Transitional Limits:
PEL*(C) 50 ppm(a)(C) 240 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)9.78 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
bis (Chloromethyl) etherCAS NO(f): 542-88-1
see 1910.1008
Chloromethyl methyl etherCAS NO(f): 107-30-2
see 1910.1006
1-Chloro-1-nitropropaneCAS NO(f): 600-25-9
Transitional Limits:
PEL*20 ppm(a)100 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ChloropentafluoroethaneCAS NO(f): 76-15-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)6320 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ChloropicrinCAS NO(f): 76-06-2
Transitional Limits:
PEL*0.1 ppm(a)0.7 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.7 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
beta-ChloropreneCAS NO(f): 126-99-8
Transitional Limits:
PEL*25 ppm(a)90 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA10 ppm(a)35 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
o-ChlorostyreneCAS NO(f): 2039-87-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)285 mg/m(3)(b)
STEL(c)75 ppm(a)428 mg/m(3)(b)
CEILING--
Skin Designation-
o-ChlorotolueneCAS NO(f): 95-49-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)250 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
2-Chloro-6-trichloro-methyl pyridineCAS NO(f): 1929-82-4
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ChlorpyrifosCAS NO(f): 2921-88-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Chromic acid and chromates (as CrO (3))CAS NO(f): 7440-47-3
Transitional Limits:
PEL*-Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.1 ppm(a)
Skin Designation-
* Chromium (II) compounds (as Cr)CAS NO(f): 7440-47-3
(This entry removed by 57 FR 29205, July 1, 1992)
Chromium, Sol. chromic, chromous salts (as Cr)CAS NO(f): 7440-47-3
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Chromium, metal and soluble saltsCAS NO(f): 7440-47-3
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Chrysene:
see Coal tar pitch volatiles
ClopidolCAS NO(f): 2971-90-6
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Coal dust (Less than 5% SiO (2))
Respirable fraction
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-9 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Coal dust (Greater than or equal to 5% SiO (2))
Respirable quartz fraction
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Coal tar pitch volatilesCAS NO(f): 65996-93-2
(Benzine soluble fraction), Anthracene, BaP, Phenanthrene, Acridine, Chrysene, Pyrene
Transitional Limits:
PEL*-0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cobalt metal, dust, and fume (as Co)CAS NO(f): 7440-48-4
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.05 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cobalt carbonyl (as Co)CAS NO(f): 10210-68-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cobalt hydrocarbonyl (as Co)CAS NO(f): 16842-03-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Coke oven emissions;
see 1910.1029
CopperCAS NO(f): 7440-50-8
Fume (as Cu)
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dusts and mists (as Cu)
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cotton dust (Raw)
Transitional Limits:
PEL* 1 mg/m(3)(b)
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
This 8-hour TWA applies to respirable dust as measured by a vertical elutriator cotton dust sampler or equivalent instrument. The time-weighted average applies to the cotton waste processing operations of waste recycling (sorting, blending, cleaning, and willowing) and garnetting. See also 1910.1043 for cotton dust limits applicable to other sectors.
Crag herbicide (Sesone)CAS NO(f): 136-78-7
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cresol, all isomersCAS NO(f): 1319-77-3
Transitional Limits:
PEL*5 ppm(a)22 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)22 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
CrotonaldehydeCAS NO(f): 123-73-9; 4170-30-3
Transitional Limits:
PEL*2 ppm(a)6 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CrufomateCAS NO(f): 299-86-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CumeneCAS NO(f): 98-82-8
Transitional Limits:
PEL*50 ppm(a)245 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA50 ppm(a)245 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
CyanamideCAS NO(f): 420-04-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cyanides (as CN)CAS NO(f): Varies With Compound
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CyanogenCAS NO(f): 460-19-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)20 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Cyanogen chlorideCAS NO(f): 506-77-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.3 ppm(a)0.6 mg/m(3)(b)
Skin Designation-
CyclohexaneCAS NO(f): 110-82-7
Transitional Limits:
PEL*300 ppm(a)1050 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA300 ppm(a)1050 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CyclohexanolCAS NO(f): 108-93-0
Transitional Limits:
PEL*50 ppm(a)200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)200 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
CyclohexanoneCAS NO(f): 108-94-1
Transitional Limits:
PEL*50 ppm(a)200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)100 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
CyclohexeneCAS NO(f): 110-83-8
Transitional Limits:
PEL*300 ppm(a)1015 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA300 ppm(a)1015 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CyclohexylamineCAS NO(f): 108-91-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)40 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CycloniteCAS NO(f): 121-82-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-1.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
CyclopentadieneCAS NO(f): 542-92-7
Transitional Limits:
PEL*75 ppm(a)200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA75 ppm(a)200 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CyclopentaneCAS NO(f): 287-92-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA600 ppm(a)1720 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
CyhexatinCAS NO(f): 13121-70-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
* 2,4-D (Dichlorophenoxyacetic acid)CAS NO(f): 94-75-7
Transitional Limits:
PEL*-10 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DecaboraneCAS NO(f): 17702-41-9
Transitional Limits:
PEL*0.05 ppm(a)0.3 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.05 ppm(a)0.3 mg/m(3)(b)
STEL(c)0.15 ppm(a)0.9 mg/m(3)(b)
CEILING--
Skin DesignationX
Demeton (Systox (R))CAS NO(f): 8065-48-3
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Dichlorodiphenyltrichloroethane (DDT)CAS NO(f): 50-29-3
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Dichlorvos (DDVP)CAS NO(f): 62-73-7
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone)CAS NO(f): 123-42-2
Transitional Limits:
PEL*50 ppm(a)240 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)240 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
1,2-Diaminoethane;
see Ethylenediamine
DiazinonCAS NO(f): 333-41-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
DiazomethaneCAS NO(f): 334-88-3
Transitional Limits:
PEL*0.2 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.2 ppm(a)0.4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DiboraneCAS NO(f): 19287-45-7
Transitional Limits:
PEL*0.1 ppm(a)0.1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
1,2-Dibromo-3-chloropropaneCAS NO(f): 96-12-8
see 1910.1044
2-N-DibutylaminoethanolCAS NO(f): 102-81-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)14 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dibutyl phosphateCAS NO(f): 107-66-4
Transitional Limits:
PEL*1 ppm(a)5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)5 mg/m(3)(b)
STEL(c)2 ppm(a)10 mg/m(3)(b)
CEILING--
Skin Designation-
Dibutyl phthalateCAS NO(f): 84-74-2
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DichloroacetyleneCAS NO(f): 7572-29-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.1 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
o-DichlorobenzeneCAS NO(f): 95-50-1
Transitional Limits:
PEL*(C) 50 ppm(a)(C) 300 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING50 ppm(a)300 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
p-DICHLOROBENZENECAS NO(f): 106-46-7
Transitional Limits:
PEL*75 ppm(a)450 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA75 ppm(a)450 mg/m(3)(b)
STEL(c)110 ppm(a)675 mg/m(3)(b)
CEILING--
Skin Designation-
3,3′ -Dichlorobenzidine;CAS NO(f): 91-94-1
see 1910.1007
Dichlorodifluoro-methaneCAS NO(f): 75-71-8
Transitional Limits:
PEL*1000 ppm(a)4950 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)4950 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
1,3-Dichloro-5,5-dimethyl hydantoinCAS NO(f): 118-52-5
Transitional Limits:
PEL*-0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)-0.4 mg/m(3)(b)
CEILING--
Skin Designation-
1,1-DichloroethaneCAS NO(f): 75-34-3
Transitional Limits:
PEL*100 ppm(a)400 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)400 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
1,2-DichloroethyleneCAS NO(f): 540-59-0
Transitional Limits:
PEL*200 ppm(a)790 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)790 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dichlorethyl etherCAS NO(f): 111-44-4
Transitional Limits:
PEL*(C) 15 ppm(a)(C) 90 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)30 mg/m(3)(b)
STEL(c)10 ppm(a)60 mg/m(3)(b)
CEILING--
Skin DesignationX
Footnote (C) denotes a ceiling limit.
Dichloromethane; see Methylene chloride
Dichloromonofluoro-methane CAS NO(f): 75-43-4
Transitional Limits:
PEL*1000 ppm(a)4200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)40 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
1,1-Dichloro-1-nitroethaneCAS NO(f): 594-72-9
Transitional Limits:
PEL*(C) 10 ppm(a)(C) 60 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation
Footnote (C) denotes a ceiling limit.
1,2-Dichloropropane;
see Propylenedichloride
1,3-DichloropropeneCAS NO(f): 542-75-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
2,2-Dichloropropionic acidCAS NO(f): 75-99-0
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DichlorotetrafluoroethaneCAS NO(f): 76-14-2
Transitional Limits:
PEL*1000 ppm(a)7000 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)7000 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DicrotophosCAS NO(f): 141-66-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.25 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
DicyclopentadieneCAS NO(f): 77-73-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)30 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dicyclopentadienyl ironCAS NO(f): 102-54-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation
DieldrinCAS NO(f): 60-57-1
Transitional Limits:
PEL* 0.25 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-.025 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
DiethanolamineCAS NO(f): 111-42-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA3 ppm(a)15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DiethylamineCAS NO(f): 109-89-7
Transitional Limits:
PEL*25 ppm(a)75 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)30 mg/m(3)(b)
STEL(c)25 ppm(a)75 mg/m(3)(b)
CEILING--
Skin Designation-
2-DiethylaminoethanolCAB NO(f): 100-37-8
Transitional Limits:
PEL*10 ppm(a)50 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA10 ppm(a)50 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Diethylene triamineCAS NO(f): 111-40-0
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Diethyl ether;
see Ethyl ether
Diethyl ketoneCAS NO(f): 96-22-0
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)705 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Diethyl phthalateCAS NO(f): 84-66-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DifluorodibromomethaneCAS NO(f): 75-61-6
Transitional Limits:
PEL*100 ppm(a)860 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA100 ppm(a)860 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Diglycidyl ether (DGE)CAS NO(f): 2238-07-5
Transitional Limits:
PEL*(C) 0.5 ppm(a)(C) 2.8 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA0.1 ppm(a)0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Dihydroxybenzene;
see Hydroquinone
Diisobutyl ketoneCAS NO(f): 108-83-8
Transitional Limits:
PEL*50 ppm(a)290 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)150 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DiisopropylamineCAS NO(f): 108-18-9
Transitional Limits:
PEL*5 ppm(a)20 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
4-Dimethylaminoazobenzene;CAS NO(f): 60-11-7
see 1910.1015
Dimethoxymethane;
see Methylal
Dimethyl acetamideCAS NO(f): 127-19-5
Transitional Limits:
PEL*10 ppm(a)35 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA10 ppm(a)35 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DimethylamineCAS NO(f): 124-40-3
Transitional Limits:
PEL*10 ppm(a)18 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)18 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dimethylaminobenzene;
see Xylidine
* Dimethylaniline (N,N-Dimethylaniline)CAS NO(f): 121-69-7
Transitional Limits:
PEL*5 ppm(a)25 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)25 mg/m(3)(b)
STEL(c)10 ppm(a)50 mg/m(3)(b)
CEILING--
Skin DesignationX
Dimethylbenzene;
see Xylene
Dimethyl-1,2-dibromo-2,2-dichloroethyl phosphateCAS NO(f): 300-76-5
Transitional Limits:
PEL*-3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
DimethyloformamideCAS NO(f): 68-12-2
Transitional Limits:
PEL*10 ppm(a)30 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA10 ppm(a)30 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
2,6-Dimethyl-4-hepta-none;
see Diisobutyl ketone
1,1-DimethylhydrazineCAS NO(f): 57-14-7
Transitional Limits:
PEL*0.5 ppm(a)1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.5 ppm(a)1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
DimethylphthalateCAS NO(f): 131-11-3
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dimethyl sulfateCAS NO(f): 77-78-1
Transitional Limits:
PEL*1 ppm(a)5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.1 ppm(a)0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Dinitolmide (3,5-Dinitro-o-toluamide)CAS NO(f): 148-01-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Dinitrobenzene (all isomers)CAS NO(f): (alpha-) 528-29-0; (meta-) 99-65-0; (para-) 100-25-4
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Dinitro-o-cresolCAS NO(f): 534-52-1
Transitional Limits:
PEL*-0.2 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
DinitrotolueneCAS NO(f): 25321-14-6
Transitional Limits:
PEL*-1.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-1.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Dioxane (Diethylene dioxide)CAS NO(f): 123-91-1
Transitional Limits:
PEL*100 ppm(a)360 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA25 ppm(a)90 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Dioxathion (Delnav)CAS NO(f): 78-34-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Diphenyl (Biphenyl)CAS NO(f): 92-52-4
Transitional Limits:
PEL*0.2 ppm(a)1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.2 ppm(a)1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DiphenylamineCAS NO(f): 122-39-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Diphenylmethane diisocyanate;
see Methylene bisphenyl isocyanate
Dipropylene glycol methyl etherCAS NO(f): 34590-94-8
Transitional Limits:
PEL*100 ppm(a)600 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA100 ppm(a)600 mg/m(3)(b)
STEL(c)150 ppm(a)900 mg/m(3)(b)
CEILING--
Skin DesignationX
Dipropyl ketoneCAS NO(f): 123-19-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)235 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DiquatCAS NO(f): 86-00-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Di-sec octyl phthalate (Di-2-ethylhexyl-phthalate)CAS NO(f): 117-81-7
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)-10 mg/m(3)(b)
CEILING--
Skin Designation-
DisulfiramCAS NO(f): 97-77-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DisulfotonCAS NO(f): 298-04-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
2,6-Di-tert-butyl-p-cresolCAS NO(f): 128-37-0
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
DiuronCAS NO(f): 330-54-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Divinyl benzeneCAS NO(f): 1321-74-0
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)50 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
* EmeryCAS NO(f): 12415-34-8
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
EndosulfanCAS NO(f): 115-29-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
EndrinCAS NO(f): 72-20-8
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
EpichlorohydrinCAS NO(f): 106-89-8
Transitional Limits:
PEL*5 ppm(a)19 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA2 ppm(a)8 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
EPNCAS NO(f): 2104-64-5
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
1,2-Epoxypropane;
see Propylene oxide
2,3-Epoxy-1-propanol;
see Glycidol
Ethanethiol;
see Ethyl mercaptan
EthanolamineCAS NO(f): 141-43-5
Transitional Limits:
PEL*3 ppm(a)6 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA3 ppm(a)8 mg/m(3)(b)
STEL(c)6 ppm(a)15 m/m(3)(b)
CEILING--
Skin Designation-
EthionCAS NO(f): 563-12-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
2-EthoxyethanolCAS NO(f): 110-80-5
Transitional Limits:
PEL*200 ppm(a)740 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA200 ppm(a)740 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
2-Ethoxyethyl acetate (Cellosolve acetate)CAS NO(f): 111-15-9
Transitional Limits:
PEL*100 ppm(a)540 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA100 ppm(a)540 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Ethyl acetateCAS NO(f): 141-78-6
Transitional Limits:
PEL*400 ppm(a)1400 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA400 ppm(a)1400 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethyl acrylateCAS NO(f): 140-88-5
Transitional Limits:
PEL*25 ppm(a)100 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)25 ppm(a)100 mg/m(3)(b)
CEILING--
Skin DesignationX
Ethyl alcohol (Ethanol)CAS NO(f): 64-17-5
Transitional Limits:
PEL*1000 ppm(a)1900 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)1900 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
EthylamineCAS NO(f): 75-04-7
Transitional Limits:
PEL*10 ppm(a)18 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)18 mg/m(3)(b)
STEL--
CEILING--
Skin Designation-
Ethyl amyl ketone (5-Methyl-3-heptanone)CAS NO(f): 541-85-5
Transitional Limits:
PEL*25 ppm(a)130 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA25 ppm(a)130 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethyl benzeneCAS NO(f): 100-41-4
Transitional Limits:
PEL*100 ppm(a)435 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA100 ppm(a)435 mg/m(3)(b)
STEL(c)125 ppm(a)545 mg/m(3)(b)
CEILING--
Skin Designation-
Ethyl bromideCAS NO(f): 74-96-4
Transitional Limits:
PEL*200 ppm(a)890 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)890 mg/m(3)(b)
STEL(c)250 ppm(a)1110 mg/m(3)(b)
CEILING--
Skin Designation-
Ethyl butyl ketone (3-Heptanone)CAS NO(f): 106-35-4
Transitional Limits:
PEL*50 ppm(a)230 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA50 ppm(a)230 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethyl chlorideCAS NO(f): 75-003
Transitional Limits:
PEL*1000 ppm(a)2600 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA1000 ppm(a)2600 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethyl etherCAS NO(f): 60-29-7
Transitional Limits:
PEL*400 ppm(a)1200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA400 ppm(a)1200 mg/m(3)(b)
STEL(c)500 ppm(a)1500 mg/m(3)(b)
CEILING--
Skin Designation-
Ethyl formateCAS NO(f): 109-94-4
Transitional Limits:
PEL*100 ppm(a)300 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)300 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethyl mercaptanCAS NO(f): 75-08-1
Transitional Limits:
PEL*(C) 10 ppm(a)(C) 25 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA0.5 ppm(a)1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Ethyl silicateCAS NO(f): 78-10-4
Transitional Limits:
PEL*100 ppm(a)850 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)85 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethylene chlorohydrinCAS NO(f): 107-07-3
Transitional Limits:
PEL*5 ppm(a)16 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)--
CEILING1 ppm(a)3 mg/m(3)(b)
Skin DesignationX
EthylenediamineCAS NO(f): 107-15-3
Transitional Limits:
PEL*10 ppm(a)25 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)25 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ethylene dibromideCAS NO(f): 106-93-4
Transitional Limits:
PEL*Tbl. Z-2Tbl. Z-2
Skin DesignationTbl. Z-2
Final Rule Limits**:
TWA
STEL(c)Tbl. Z-2Tbl. Z-2
CEILINGTbl. Z-2Tbl. Z-2
Skin DesignationTbl. Z-2
Ethylene DichlorideCAS NO(f): 107-06-2
Transitional Limits:
PEL*Tbl. Z-2Tbl. Z-2
Skin DesignationTbl. Z-2
Final Rule Limits**:
TWA1 ppm(a)4 mg/m(3)(b)
STEL(c)2 ppm(a)8 mg/m(3)(b)
CEILING--
Skin Designation-
Ethylene glycolCAS NO(f): 107-21-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING50 ppm(a)125 mg/m(3)(b)
Skin Designation-
Ethylene glycol dinitrate(k)CAS NO(f): 628-96-6
Transitional Limits:
PEL*(C) 0.2 ppm(a)(C) 1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)-0.1 mg/m(3)(b)(k)
CEILING--
Skin DesignationX
Footnote (C) denotes a ceiling limit.
Footnote (k) The Final Rule Limit STEL of 0.1 mg/m(3) is not in effect as a result of reconsideration for the industrial sector of civilian manufacture and distribution of explosives and propellants for civilian use. The Final rule limits skin designation and the Transitional limits ceiling limit of 1 mg/ m(3) remain in effect for this sector until completion of the reconsideration.
Ethylene glycol methyl acetate;
see Methyl cellosolve accetate
Ethyleneimine;CAS NO(f): 151-56-4
see 1910.1012
Ethylene oxide;CAS NO(f): 75-21-8
see 1910.1047
Ethylidene chloride;
see 1,1-Dichlorethane
Ethylidene norborneneCAS NO(f): 16219-75-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING5 ppm(a)25 mg/m(3)(b)
Skin Designation-
N-EthylmorpholineCAS NO(f): 100-74-3
Transitional Limits:
PEL*20 ppm(a)94 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)23 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
FenamiphosCAS NO(f): 22224-92-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Fensulfothion (Dasanit)CAS NO(f): 115-90-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
FenthionCAS NO(f): 55-38-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
FerbamCAS NO(f): 14484-64-1
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Ferrovanadium dustCAS NO(f): 12604-58-9
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL-3 mg/m(3)(b)
CEILING--
Skin Designation-
Fluorides (as F)CAS NO(f): Varies with Compound
Transitional Limits:
PEL*-2.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-2.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
FluorineCAS NO(f): 77821-41-4
Transitional Limits:
PEL*0.1 ppm(a)0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Fluorotrichloro-methane (Trichloro-fluoromethane)CAS NO(f): 75-69-4
Transitional Limits:
PEL*1000 ppm(a)5600 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING1000 ppm(a)5600 mg/m(3)(b)
Skin Designation-
FononfosCAS NO(f): 944-22-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
* Formaldehyde;CAS NO(f): 50-00-0
see 1910.1048
FormamideCAS NO(f): 75-12-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA20 ppm(a)30 mg/m(3)(b)
STEL(c)30 ppm(a)45 mg/m(3)(b)
CEILING--
Skin Designation-
Formic acidCAS NO(f): 64-18-6
Transitional Limits:
PEL*5 ppm(a)9 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)9 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
FurfuralCAS NO(f): 98-01-1
Transitional Limits:
PEL*5 ppm(a)20 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA2 ppm(a)8 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Furfuryl alcoholCAS NO(f): 98-00-0
Transitional Limits:
PEL*50 ppm(a)200 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)40 mg/m(3)(b)
STEL(c)15 ppm(a)60 mg/m(3)(b)
CEILING--
Skin DesignationX
GasolineCAS NO(f): 8006-61-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA300 ppm(a)900 mg/m(3)(b)
STEL(c)500 ppm(a)1500 mg/m(3)(b)
CEILING--
Skin Designation-
Germanium tetrahydrideCAS NO(f): 7782-65-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.2 ppm(a)0.6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
GlutaraldehydeCAS NO(f): 111-30-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.2 ppm(a)0.8 mg/m(3)(b)
Skin Designation-
Glycerin (Mist)CAS NO(f): 56-81-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
GlycidolCAS NO(f): 556-52-5
Transitional Limits:
PEL*50 ppm(a)150 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)75 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Glycol monoethyl ether;
see 2-Ethoxyethanol
Grain dust (oat, wheat, barley)
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Graphite, natural respirable dustCAS NO(f): 7782-42-5
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-2.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Graphite, synthetic
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Guthion (R);
see Azinphos methyl
GypsumCAS NO(f): 13397-24-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
HafniumCAS NO(f): 7440-58-6
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
HeptachlorCAS NO(f): 76-44-8
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Heptane (n-Heptane)CAS NO(f): 142-82-5
Transitional Limits:
PEL*500 ppm(a)2000 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA400 ppm(a)1600 mg/m(3)(b)
STEL(c)500 ppm(a)2000 mg/m(3)(b)
CEILING--
Skin Designation-
HexachlorobutadieneCAS NO(f): 87-68-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.02 ppm(a)0.24 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hexachlorocyclo-pentadieneCAS NO(f): 77-47-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.01 ppm(a)0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
HexachloroethaneCAS NO(f); 67-72-1
Transitional Limits:
PEL*1 ppm(a)10 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA1 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
HexachloronaphthaleneCAS NO(f): 1335-87-1
Transitional Limits:
PEL*-0.2 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
HexafluoracetoneCAS NO(f): 684-16-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.7 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
n-HexaneCAS NO(f): 110-54-3
Transitional Limits:
PEL*500 ppm(a)1800 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)180 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hexane isomersCAS NO(f): Varies With Compound
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA500 ppm(a)1800 mg/m(3)(b)
STEL(c)1000 ppm(a)3600 mg/m(3)(b)
CEILING--
Skin Designation-
2-Hexanone (Methyl n-butyl ketone)CAS NO(f): 591-78-6
Transitional Limits:
PEL*100 ppm(a)410 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hexone (Methyl isobutyl ketone)CAS NO(f): 108-10-1
Transitional Limits:
PEL*100 ppm(a)410 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)205 mg/m(3)(b)
STEL(c)75 ppm(a)300 mg/m(3)(b)
CEILING--
Skin Designation-
sec-Hexyl acetateCAS NO(f): 108-84-9
Transitional Limits:
PEL*50 ppm(a)300 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)300 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hexylene glycolCAS NO(f): 107-41-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING25 ppm(a)125 mg/m(3)(b)
Skin Designation-
HydrazineCAS NO(f): 302-01-2
Transitional Limits:
PEL*1 ppm(a)1.3 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.1 ppm(a)0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Hydrogenated terphenylsCAS NO(f): 61788-32-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hydrogen bromideCAS NO(f): 10035-10-6
Transitional Limits:
PEL*3 ppm(a)10 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING3 mg/m(3)(b)10 mg/m(3)(b)
Skin Designation-
Hydrogen chlorideCAS NO(f): 7647-01-0
Transitional Limits:
PEL*(C) 5 ppm(a)(C) 7 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING5 ppm(a)7 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
Hydrogen cyanideCAS NO(f): 74-90-8
Transitional Limits:
PEL*10 ppm(a)11 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)4.7 ppm(a)5 mg/m(3)(b)
CEILING--
Skin DesignationX
Hydrogen fluoride (as F)CAS NO(f): 7664-39-3
Transitional Limits:
PEL*Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA3 ppm(a)-
STEL(c)6 ppm(a)-
CEILING--
Skin Designation-
Hydrogen peroxideCAS NO(f): 7722-84-1
Transitional Limits:
PEL*1 ppm(a)1.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)1.4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hydrogen selenide (as Se)CAS NO(f): 7783-07-5
Transitional Limits:
PEL*0.05 ppm(a)0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.05 ppm(a)0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Hydrogen sulfideCAS NO(f): 7783-06-4
Transitional Limits:
PEL*Tbl. Z-2Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)14 mg/m(3)(b)
STEL(c)15 ppm(a)21 mg/m(3)(b)
CEILING--
Skin Designation-
HydroquinoneCAS NO(f): 123-31-9
Transitional Limits:
PEL*-2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
2-Hydroxypropyl acrylateCAS NO(f): 999-61-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
IndeneCAS NO(f): 95-13-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)45 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Indium and compounds (as in)CAS NO(f): 7440-74-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
IodineCAS NO(f): 7553-56-2
Transitional Limits:
PEL*(C) 0.1 ppm(a)(C) 1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.1 ppm(a)1 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
IodoformCAS NO(f): 75-47-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.6 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Iron oxide fume (as Fe)CAS NO(f): 1309-37-1
Total Particulate
Transitional Limits:
PEL*-10 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Iron pentacarbonyl (as Fe)CAS NO(f): 13463-40-6
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.8 mg/m(3)(b)
STEL(c)0.2 ppm(a)1.6 mg/m(3)(b)
CEILING--
Skin Designation-
Iron salts (Soluable) (as Fe)CAS NO(f): Varies With Compound
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isomyl acetateCAS NO(f): 123-92-2
Transitional Limits:
PEL*100 ppm(a)525 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)525 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isomyl alcohol (primary and secondary)CAS NO(f): 123-51-3
Transitional Limits:
PEL*100 ppm(a)360 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)360 mg/m(3)(b)
STEL(c)125 ppm(a)450 mg/m(3)(b)
CEILING--
Skin Designation-
Isobutyl acetateCAS NO(f): 110-19-0
Transitional Limits:
PEL*150 ppm(a)700 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA150 ppm(a)700 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isobutyl alcoholCAS NO(f): 78-83-1
Transitional Limits:
PEL*100 ppm(a)300 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)150 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isooctyl alcoholCAS NO(f): 26952-21-6
Transitional Limits:
PEL*--
Skin Designation
Final Rule Limits**:
TWA50 ppm(a)270 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
IsophoroneCAS NO(f): 78-59-1
Transitional Limits:
PEL*25 ppm(a)140 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA4 ppm(a)23 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isophorone diisocyanateCAS NO(f): 4098-71-9
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.005 ppm(a)-
STEL(c)0.02 ppm(a)-
CEILING--
Skin DesignationX
2-IsopropoxyethanolCAS NO(f): 109-59-1
Transitional Limits:
PEL*
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)105 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isopropyl acetateCAS NO(f): 108-21-4
Transitional Limits:
PEL*250 ppm(a)950 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA250 ppm(a)950 mg/m(3)(b)
STEL(c)310 ppm(a)1185 mg/m(3)(b)
CEILING--
Skin Designation-
Isopropyl alcoholCAS NO(f): 67-63-0
Transitional Limits:
PEL*400 ppm(a)980 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA400 ppm(a)980 mg/m(3)(b)
STEL(c)500 ppm(a)1225 mg/m(3)(b)
CEILING--
Skin Designation-
IsopropylamineCAS NO(f): 75-31-0
Transitional Limits:
PEL*5 ppm(a)12 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)12 mg/m(3)(b)
STEL(c)10 ppm(a)24 mg/m(3)(b)
CEILING--
Skin Designation-
N-IsopropylanilineCAS NO(f): 768-52-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Isopropyl etherCAS NO(f): 108-20-3
Transitional Limits:
PEL*500 ppm(a)2100 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA500 ppm(a)2100 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Isopropyl glycidyl ether (IGE)CAS NO(f): 4016-14-2
Transitional Limits:
PEL*50 ppm(a)240 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)240 mg/m(3)(b)
STEL(c)75 ppm(a)360 mg/m(3)(b)
CEILING--
Skin Designation-
Kaolin
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
KeteneCAS NO(f): 463-51-4
Transitional Limits:
PEL*0.5 ppm(a)0.9 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)0.9 mg/m(3)(b)
STEL(c)1.5 ppm(a)3 mg/m(3)(b)
CEILING--
Skin Designation-
Lead inorganic (as Pb)CAS NO(f): 7439-92-1
see 1910.1025
LimestoneCAS NO(f): 1317-65-3
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
LindaneCAS NO(f): 58-89-9
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Lithium hydrideCAS NO(f): 7580-67-8
Transitional Limits:
PEL*-0.025 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.025 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
L.P.G. (Liquified petroleum gas)CAS NO(f): 68476-85-7
Transitional Limits:
PEL*1000 ppm(a)1800 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)1800 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
MagnesiteCAS NO(f): 546-93-0
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL* 5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Magnesium oxide fumeCAS NO(f): 1309-48-4
Total Particulate
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
MalathionCAS NO(f): 121-75-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Maleic anhydrideCAS NO(f): 108-31-6
Transitional Limits:
PEL*0.25 ppm(a)1 mg/m(3)(b)
Final Rule Limits**:
TWA0.25 ppm(a)1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Manganese compounds (as Mn)CAS NO(f): 7439-96-5
Transitional Limits:
PEL*-(C) 5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING-5 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
Manganese fume (as Mn)CAS NO(f): 7439-96-5
Transitional Limits:
PEL*-(C) 5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)-3 mg/m(3)(b)
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Manganese cyclopetadienyl tricarbonyl (as Mn)CAS NO(f): 12079-65-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Manganese tetroxide (as Mn)CAS NO(f): 1317-35-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
MarbleCAS NO(f): 1317-65-3
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Mercury (aryl and inorganic) (as Hg)CAS NO(f): 7439-97-6
Transitional Limits:
PEL* Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING-0.1 mg/m(3)(b)
Skin DesignationX
Mercury (organo) alkyl compounds (as Hg)CAS NO(f): 7439-97-6
Transitional Limits:
PEL* Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA-0.01 mg/m(3)(b)
STEL(c)-0.03 mg/m(3)(b)
CEILING--
Skin DesignationX
Mercury (vapor) (as Hg)CAS NO(f): 7439-97-6
Transitional Limits:
PEL* Tbl. Z-2
Skin Designation-
Final Rule Limits**:
TWA-0.05 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Mesityl oxideCAS NO(f): 141-79-7
Transitional Limits:
PEL*25 ppm(a)100 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA15 ppm(a)60 mg/m(3)(b)
STEL(c)25 ppm(a)100 mg/m(3)(b)
CEILING--
Skin DesignationX
Methacrylic acidCAS NO(f): 79-41-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA20 ppm(a)70 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methanethiol;
see Methyl mercaptan
Methomyl (Lannate)CAS NO(f): 16752-77-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
MethoxychlorCAS NO(f): 72-43-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
2-Methoxyethanol;
see Methyl cellosolve
4-MethoxyphenolCAS NO(f): 150-76-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Methyl acetateCAS NO(f): 79-20-9
Transitional Limits:
PEL*200 ppm(a)610 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)610 mg/m(3)(b)
STEL(c)250 ppm(a)760 mg/m(3)(b)
CEILING--
Skin Designation-
Methyl acetylene (Propyne)CAS NO(f): 74-99-7
Transitional Limits:
PEL*1000 ppm(a)1650 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)1650 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Methyl acetylene propadiene mixture (MAPP)
Transitional Limits:
PEL*1000 ppm(a)1800 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)1800 mg/m(3)(b)
STEL(c)1250 ppm(a)2250 mg/m(3)(b)
CEILING--
Skin Designation-
Methyl acrylateCAS NO(f): 96-33-3
Transitional Limits:
PEL*10 ppm(a)35 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA10 ppm(a)35 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
MethylacrylonitrileCAS NO(f): 126-98-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methyial (Dimethoxy-methane)CAS NO(f): 109-87-5
Transitional Limits:
PEL*1000 ppm(a)3100 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)3100 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Methyl alcoholCAS NO(f): 67-56-1
Transitional Limits:
PEL*200 ppm(a)260 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)260 mg/m(3)(b)
STEL(c)250 ppm(a)325 mg/m(3)(b)
CEILING--
Skin DesignationX
MethylamineCAS NO(f): 74-89-5
Transitional Limits:
PEL*10 ppm(a)12 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)12 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Methyl amyl alcohol;
see Methyl Isobutyl carbinol
Methyl n-amyl ketoneCAS NO(f): 110-43-0
Transitional Limits:
PEL*100 ppm(a)465 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)465 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Methyl bromideCAS NO(f): 74-83-9
Transitional Limits:
PEL*(C) 20 ppm(a)(C) 80 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Footnote (C) denotes a ceiling limit.
Methyl butyl ketone;
see 2-Hexanone
Methyl cellosolve (2-Methoxyethanol)CAS NO(f): 109-86-4
Transitional Limits:
PEL*25 ppm(a)80 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA25 ppm(a)80 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methyl cellosolve acetate (2-Methoxyethyl acetate)CAS NO(f): 110-49-6
Transitional Limits:
PEL*25 ppm(a)120 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA25 ppm(a)120 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methyl chlorideCAS NO(f): 74-87-3
Transitional Limits:
PEL* Tbl. Z-2
Final Rule Limits**:
TWA50 ppm(a)105 mg/m(3)(b)
STEL(c)100 ppm(a)210 mg/m(3)(b)
CEILING -
Skin Designation
Methyl chloroform (1,1,1-Trichloroethane)CAS NO(f): 71-55-6
Transitional Limits:
PEL*350 ppm(a)1900 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA350 ppm(a)1900 mg/m(3)(b)
STEL(c)450 ppm(a)2450 mg/m(3)(b)
CEILING--
Skin Designation-
Methyl 2-cyanoacrylateCAS NO(f): 137-05-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)8 mg/m(3)(b)
STEL(c)4 ppm(a)16 mg/m(3)(b)
CEILING--
Skin Designation-
MethylcyclohexaneCAS NO(f): 108-87-2
Transitional Limits:
PEL*500 ppm(a)2000 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA400 ppm(a)1600 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
MethylcyclohexanolCAS NO(f): 25639-42-3
Transitional Limits:
PEL*100 ppm(a)470 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)235 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
o-MethylcyclohexanoneCAS NO(f): 583-60-8
Transitional Limits:
PEL*100 ppm(a)460 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA50 ppm(a)230 mg/m(3)(b)
STEL(c)75 ppm(a)345 mg/m(3)(b)
CEILING--
Skin DesignationX
Methylcyclopentiadienyl manganese tricarbonyl (as Mn)CAS NO(f): 12108-13-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methyl demetonCAS NO(f): 8022-00-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
4,4′-Methylene bis (2-chloroaniline) (MBOCA)CAS NO(f): 101-14-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.02 ppm(a)0.22 mg/m(3)(b)
STEL(c)--
CEILING-
Skin DesignationX
Methylene bis (4-cyclohexylisocyanate)CAS NO(f): 5124-30-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.01 ppm(a)0.11 mg/m(3)(b)
Skin DesignationX
Methylene chlorideCAS NO(f): 75-09-2
Transitional Limits:
PEL*Tbl. Z-2-
Skin Designation-
Final Rule Limits**:
TWATbl. Z-2-
STEL(c)Tbl. Z-2-
CEILINGTbl. Z-2-
Skin Designation-
Methyl ethyl ketone peroxide (MEKP)CAS NO(f): 1338-23-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.7 ppm(a)5 mg/m(3)(b)
Skin Designation-
Methyl formateCAS NO(f): 107-31-3
Transitional Limits:
PEL*100 ppm(a)250 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)250 mg/m(3)(b)
STEL(c)150 ppm(a)375 mg/m(3)(b)
CEILING--
Skin Designation-
Methyl hydrazine (Monomethyl hydrazine)CAS NO(f): 60-34-4
Transitional Limits:
PEL*(C) 0.2 ppm(a)(C) 0.35 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.2 ppm(a)0.35 mg/m(3)(b)
Skin DesignationX
Footnote (C) denotes a ceiling limit.
Methyl iodideCAS NO(f): 74-88-4
Transitional Limits:
PEL*5 ppm(a)28 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA2 ppm(a)10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methyl isoamyl ketoneCAS NO(f): 110-12-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)240 mg/m(3)(b)
STEL(c)-
CEILING -
Skin Designation-
Methyl isobutyl carbinolCAS NO(f): 108-11-2
Transitional Limits:
PEL*25 ppm(a)100 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA25 ppm(a)100 mg/m(3)(b)
STEL(c)40 ppm(a)165 mg/m(3)(b)
CEILING--
Skin DesignationX
Methyl isobutyl ketone; see Hexone
Methyl isocyanateCAS NO(f): 624-83-9
Transitional Limits:
PEL*0.02 ppm(a)0.05 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.02 ppm(a)0.05 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Methyl isopropyl ketoneCAS NO(f): 563-80-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)705 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Methyl mercaptanCAS NO(f): 74-93-1
Transitional Limits:
PEL*(C) 10 ppm(a)(C) 20 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Methyl methacrylateCAS NO(f): 80-62-2
Transitional Limits:
PEL*100 ppm(a)410 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)410 mg/m(3)(b)
STEL(c)-
CEILING--
Skin Designation-
Methyl parathionCAS NO(f): 298-00-0
Transitional Limits:
PEL*-
Skin Designation-
Final Rule Limits**:
TWA-
STEL(c)-
CEILING-
Skin DesignationX
Methyl propyl ketone;
see 2-Pentanone
Methyl silicateCAS NO(f): 681-84-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
alpha-Methyl styreneCAS NO(f): 98-83-9
Transitional Limits:
PEL*(C) 100 ppm(a)(C) 480 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA50 ppm(a)240 mg/m(3)(b)
STEL(c)100 ppm(a)485 mg/m(3)(b)
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Methylene bisphenyl isocyanate (MDI)CAS NO(f): 101-68-8
Transitional Limits:
PEL*(C) 0.02 ppm(a)(C) 0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.02 ppm(a)0.2 mg/m(3)(b)
Skin Designation-
Footnote (C) denotes a ceiling limit.
MetribuzinCAS NO(f): 21087-64-9
Transitional Limits:
PEL*-
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Mica;
see Silicates
Molybdenum (as Mo)CAS NO(f): 7439-98-7
Soluble compounds
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Insoluble Compounds-total dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Monocrotophos (Azodrin (R))CAS NO(f): 6923-22-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.25 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Monomethyl anilineCAS NO(f): 100-61-8
Transitional Limits:
PEL*2 ppm(a)9 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.5 ppm(a)2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
MorpholineCAS NO(f): 110-91-8
Transitional Limits:
PEL*20 ppm(a)70 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA20 ppm(a)70 mg/m(3)(b)
STEL(c)30 ppm(a)105 mg/m(3)(b)
CEILING--
Skin DesignationX
Naphtha (Coal tar)CAS NO(f): 8030-30-6
Transitional Limits:
PEL*100 ppm(a)400 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)400 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
NaphthaleneCAS NO(f): 91-20-3
Transitional Limits:
PEL*10 ppm(a)50 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)50 mg/m(3)(b)
STEL(c)15 ppm(a)75 mg/m(3)(b)
CEILING--
Skin Designation-
alpha-Naphthylamine;CAS NO(f): 134-32-7
see 1910.1004
beta-Naphthylamine;CAS NO(f): 91-59-8
see 1910.1009
Nickel carbonyl (as Ni)CAS NO(f): 13463-39-3
Transitional Limits:
PEL*0.001 ppm(a)0.007 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.001 ppm(a)0.007 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Nickel, metal and insoluble compounds (as Ni)CAS NO(f): 7440-02-0
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Nickel, insoluble compounds (as Ni)CAS NO(f): 7440-02-0
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
NicotineCAS NO(f): 54-11-5
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Nitric acidCAS NO(f): 7697-37-2
Transitional Limits:
PEL*2 ppm(a)5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA2 ppm(a)5 mg/m(3)(b)
STEL(c)4 ppm(a)10 mg/m(3)(b)
CEILING--
Skin Designation-
Nitric oxideCAS NO(f): 10102-43-9
Transitional Limits:
PEL*25 ppm(a)30 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)30 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
p-NitroanilineCAS NO(f): 100-01-6
Transitional Limits:
PEL*1 ppm(a)6 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
NitrobenzeneCAS NO(f): 98-95-3
Transitional Limits:
PEL*1 ppm(a)5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA1 ppm(a)5 mg/m(3)(b)
STEL(c)--
CEILING-
Skin DesignationX
p-NitrochlorobenzeneCAS NO(f): 100-00-5
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING-
Skin DesignationX
4-Nitrodiphenyl;CAS NO(f): 92-93-3
see 1910.1003
NitroethaneCAS NO(f): 79-24-3
Transitional Limits:
PEL*100 ppm(a)310 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)310 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Nitrogen dioxideCAS NO(f): 10102-44-0
Transitional Limits:
PEL*(C) 5 ppm(a)(C) 9 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)1.8 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Footnote (C) denotes a ceiling limit.
Nitrogen trifluorideCAS NO(f): 7783-54-1
Transitional Limits:
PEL*10 ppm(a)29 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)29 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Nitroglycerin(1)CAS NO(f): 55-63-0
Transitional Limits:
PEL*(C) 0.2 ppm(a)(C) 2 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA--
STEL(c)-0.1 mg/m(3)(b)(l)
CEILING--
Skin DesignationX
Footnote (C) denotes a ceiling limit.
Footnote (1) The Final Rule Limit STEL of 0.1 mg/m(3) is not in effect as a result of reconsideration for the industrial sector of civilian manufacture and distribution of explosives and propellants for civilian use. The Final rule limits skin designation and the Transitional limits ceiling limit of 2 mg/m(3) remains in effect for this sector until completion of the reconsideration.
NitromethaneCAS NO(f): 75-52-5
Transitional Limits:
PEL*100 ppm(a)250 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)250 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
1-NitropropaneCAS NO(f): 108-03-2
Transitional Limits:
PEL*25 ppm(a)90 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)90 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
2-NitropropaneCAS NO(f): 79-46-9
Transitional Limits:
PEL*25 ppm(a)90 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)35 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
N-Nitrosodimethylamine;CAS NO(f): 62-79-9
see 1910.1016
Nitrotoluene
CAS NO(f): o-isomer 88-72-2; m-isomer 99-08-1; p-isomer 99-99-0
Transitional Limits:
PEL*5 ppm(a)30 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA2 ppm(a)11 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Nitrotrichloromethane; see Chloropicrin
NonaneCAS NO(f): 111-84-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)1050 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
OctachloronaphthaleneCAS NO(f): 2234-13-1
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)-0.3 mg/m(3)(b)
CEILING--
Skin DesignationX
OctaneCAS NO(f): 111-65-9
Transitional Limits:
PEL*500 ppm(a)2350 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA300 ppm(a)1450 mg/m(3)(b)
STEL(c)375 ppm(a)1800 mg/m(3)(b)
CEILING--
Skin Designation-
Oil mist, mineralCAS NO(f): 8012-95-1
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Osmium tetroxide (as Os)CAS NO(f): 20816-12-0
Transitional Limits:
PEL*-0.002 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.0002 ppm(a)0.002 mg/m(3)(b)
STEL(c)0.0006 ppm(a)0.006 mg/m(3)(b)
CEILING--
Skin Designation-
Oxalic acidCAS NO(f): 144-62-7
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)-2 mg/m(3)(b)
CEILING--
Skin Designation-
Oxygen difluorideCAS NO(f): 7783-41-7
Transitional Limits:
PEL*0.05 ppm(a)0.1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.05 ppm(a)0.1 mg/m(3)(b)
Skin Designation-
OzoneCAS NO(f): 10028-15-6
Transitional Limits:
PEL*0.1 ppm(a)0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.2 mg/m(3)(b)
STEL(c)0.3 ppm(a)0.6 mg/m(3)(b)
CEILING--
Skin Designation-
Paraffin wax fumeCAS NO(f): 8002-74-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Paraquat, respirable dustCAS NO(f): 1910-42-5; 2074-50-2; 4685-14-7
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
ParathionCAS NO(f): 56-38-2
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Particulates not otherwise regulated
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING-
Skin Designation-
PentaboraneCAS NO(f): 19624-22-7
Transitional Limits:
PEL*0.005 ppm(a)0.01 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.005 ppm(a)0.01 mg/m(3)(b)
STEL(c)0.015 ppm(a)0.03 mg/m(3)(b)
CEILING--
Skin Designation-
PentachloronaphthaleneCAS NO(f): 1321-64-8
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
PentachlorophenolCAS NO(f): 87-86-5
Transitional Limits:
PEL*-0.5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
PentaerythritolCAS NO(f): 115-77-5
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
PentaneCAS NO(f): 109-66-0
Transitional Limits:
PEL*1000 ppm(a)2950 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA600 ppm(a)1800 mg/m(3)(b)
STEL(c)750 ppm(a)2250 mg/m(3)(b)
CEILING--
Skin Designation-
2-Pentanone (Methyl propyl ketone)CAS NO(f): 107-87-9
Transitional Limits:
PEL*200 ppm(a)700 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)700 mg/m(3)(b)
STEL(c)250 ppm(a)875 mg/m(3)(b)
CEILING--
Skin Designation-
Pentachloronaphthalene (Tetrachloroethylene)CAS NO(f): 127-18-4
Transitional Limits:
PEL*Tbl. Z-2-
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)170 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Perchloromethyl mercaptanCAS NO(f): 594-42-3
Transitional Limits:
PEL*0.1 ppm(a)0.8 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.8 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Perchloryl fluorideCAS NO(f): 7616-94-6
Transitional Limits:
PEL*3 ppm(a)13.5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA3 ppm(a)14 mg/m(3)(B)
STEL(c)6 ppm(a)28 mg/m(3)(b)
CEILING--
Skin Designation-
Perlite
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
* Petroleum distillates (Naphtha) (Rubber Solvent)
Transitional Limits:
PEL*500 ppm(a)2000 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA400 ppm(a)1600 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
PhenolCAS NO(f): 108-95-2
Transitional Limits:
PEL*5 ppm(a)19 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)19 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
PhenothiazineCAS NO(f): 92-84-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
p-Phenylene diamineCAS NO(f): 106-50-3
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA 0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Phenyl ether, vaporCAS NO(f): 101-84-8
Transitional Limits:
PEL*1 ppm(a)7 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)7 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Phenyl ether-biphenyl mixture, vapor
Transitional Limits:
PEL*1 ppm(a)7 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)7 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Phenylethylene;
see Styrene
Phenyl glycidyl ether (PGE)CAS NO(f): 122-60-1
Transitional Limits:
PEL*10 ppm(a)60 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
PhenylhydrazineCAS NO(f): 100-63-0
Transitional Limits:
PEL*5 ppm(a)22 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA5 ppm(a)20 mg/m(3)(b)
STEL(c)10 ppm(a)45 mg/m(3)(b)
CEILING--
Skin DesignationX
Phenyl mercaptanCAS NO(f): 108-98-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.5 ppm(a)2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
PhenylphosphineCAS NO(f): 638-21-1
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.05 ppm(a)0.25 mg/m(3)(b)
Skin Designation-
PhorateCAS NO(f): 298-02-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.05 mg/m(3)(b)
STEL(c)-0.2 mg/m(3)(b)
CEILING--
Skin DesignationX
Phosdrin (Mevinphos (R))CAS NO(f): 7786-34-7
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA0.01 ppm(a)0.1 mg/m(3)(b)
STEL(c)0.03 ppm(a)0.3 mg/m(3)(b)
CEILING--
Skin DesignationX
Phosgene (Carbonyl chloride)CAS NO(f): 75-44-5
Transitional Limits:
PEL*0.1 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
PhosphineCAS NO(f): 7803-51-2
Transitional Limits:
PEL*0.3 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.3 ppm(a)0.4 mg/m(3)(b)
STEL(c)1 ppm(a)1 mg/m(3)(b)
CEILING--
Skin Designation-
Phosphoric acidCAS NO(f): 7664-38-2
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)-3 mg/m(3)(b)
CEILING--
Skin Designation-
Phosphorus (yellow)CAS NO(f): 7723-14-0
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Phosphorous oxychlorideCAS NO(f): 10025-87-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Phosphorus pentachlorideCAS NO(f): 10026-13-8
Transitional Limits:
PEL*-1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Phosphorus pentasulfideCAS NO(f): 1314-80-3
Transitional Limits:
PEL* 1 mg/m(3)(b)
Skin designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)-3 mg/m(3)(b)
CEILING--
Skin Designation-
Phosphorus trichlorideCAS NO(f): 7719-12-2
Transitional Limits:
PEL*0.5 ppm(a)3 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.2 ppm(a)1.5 mg/m(3)(b)
STEL(c)0.5 ppm(a)3 mg/m(3)(b)
CEILING--
Skin Designation-
Phthalic anhydrideCAS NO(f): 85-44-9
Transitional Limits:
PEL*2 ppm(a)12 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
m-PhthalodinitrileCAS NO(f): 626-17-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
PictoramCAS NO(f): 1918-02-1
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Picric acidCAS NO(f): 88-89-1
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Piperazine dihydro-chlorideCAS NO(f): 142-64-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Pindone (2-Pivalyl-1,3-indandione)CAS NO(f): 83-26-1
Transitional Limits:
PEL*-0.1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Plaster of parisCAS NO(f): 26499-65-0
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Platinum (as Pt)CAS NO(f): 7440-06-4
Metal
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Soluble Salts
Transitional Limits:
PEL*-0.002 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.002 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Portland cementCAS NO(f): 65997-15-1
Total Dust
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits **:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Potassium hydroxideCAS NO(f): 1310-58-3
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING-2 mg/m(3)(b)
Skin Designation-
PropaneCAS NO(f): 74-98-6
Transitional Limits:
PEL*1000 ppm(a)1800 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA1000 ppm(a)1800 mg/m(3)(b)
STEL(c)--
CEILING
Skin Designation-
Propargyl alcoholCAS NO(f): 107-19-7
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA1 ppm(a)2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
beta-Propriolactone;CAS NO(f): 57-57-8
see 1910.1013
Propionic acidCAS NO(f): 79-09-4
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)30 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Propoxur (Baygon)CAS NO(f): 114-26-1
Transitonal Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
n-Propyl acetateCAS NO(f): 109-60-4
Transitional Limits:
PEL*200 ppm(a)840 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)840 mg/m(3)(b)
STEL(c)250 ppm(a)1050 mg/m(3)(b)
CEILING--
Skin Designation-
n-Propyl alcoholCAS NO(f): 71-23-8
Transitional Limits:
PEL*200 ppm(a)500 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA200 ppm(a)500 mg/m(3)(b)
STEL(c)250 ppm(a)625 mg/m(3)(b)
CEILING--
Skin Designation-
n-Propyl nitrateCAS NO(f): 627-13-4
Transitional Limits:
PEL*25 ppm(a)110 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA25 ppm(a)105 mg/m(3)(b)
STEL(c)40 ppm(a)170 mg/m(3)(b)
CEILING--
Skin Designation-
Propylene dichlorideCAS NO(f): 78-87-5
Transitional Limits:
PEL*75 ppm(a)350 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA75 ppm(a)350 mg/m(3)(b)
STEL(c)110 ppm(a)510 mg/m(3)(b)
CEILING--
Skin Designation-
Propylene glycol dinitrateCAS NO(f): 6423-43-4
Transitional Limits:
PEL*-
Skin Designation-
Final Rule Limits**:
TWA0.05 ppm(a)0.8 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Propylene glycol monomethyl etherCAS NO(f): 107-98-2
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA100 ppm(a)360 mg/m(3)(b)
STEL(c)150 ppm(a)540 mg/m(3)(b)
CEILING--
Skin Designation-
Propylene imineCAS NO(f): 75-55-8
Transitional Limits:
PEL*2 ppm(a)5 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA2 ppm(a)5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin DesignationX
Propylene oxideCAS NO(f): 75-56-9
Transitional Limits:
PEL*100 ppm(a)240 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA20 ppm(a)50 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Propyne;
see Methyl acetylene
PyrethrumCAS NO(f): 8003-34-7
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)-
STEL(c)--
CEILING--
Skin Designation-
PyridineCAS NO(f): 110-86-1
Transitional Limits:
PEL*5 ppm(a)15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)15 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
QuinoneCAS NO(f): 106-51-4
Transitional Limits:
PEL*0.1 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.1 ppm(a)0.4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
ResorcinolCAS NO(f): 108-46-3
Transitional Limits:
PEL*
Skin Designation-
Final Rule Limits**:
TWA10 ppm(a)45 mg/m(3)(b)
STEL(c)20 ppm(a)90 mg/m(3)(b)
CEILING--
Skin Designation-
Rhodium (as Rh), metal fume and insoluble compoundsCAS NO(f): 7440-16-6
Transitional Limits:
PEL* 0.1 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING-
Skin Designation-
Rhodium (as Rh), soluble compoundsCAS NO(f): 7440-16-6
Transitional Limits:
PEL*-0.001 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.001 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
RonnelCAS NO(f): 299-84-3
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Rosin core solder pyrolysis products, as formaldehyde
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
RotenoneCAS NO(f): 83-79-4
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Rouge
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Selenium compounds (as Se)CAS NO(f): 7782-49-2
Transitional Limits:
PEL*-0.2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Selenium hexafluoride (as Se)CAS NO(f): 7783-79-1
Transitional Limits:
PEL*0.05 ppm(a)0.4 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA0.05 ppm(a)0.4 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silica, amorphous, precipitated and gelCAS NO(f): 112926-00-8
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silica, amorpous, diatomaceous earth, containing less than 1% cyrstalline silicaCAS NO(f): 61790-53-2
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
* Silica, crystalline cristobalite, respirable dustCAS NO(f): 14464-46-1
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-0.05 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
* Silica, crystalline quartz, respirable dustCAS NO(f): 14808-60-7
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silica, crystalline tripoli (as quartz), respirable dustCAS NO(f): 1317-95-9
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
* Silica, crystalline tridymite, respirable dustCAS NO(f): 15468-32-3
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-0.05 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silica, fused, respirable dustCAS NO(f): 60676-86-0
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-0.1 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silicates (less than 1% crystalline silica CAS NO(f): 12001-26-2
Mica (respirable dust)
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Soapstone, Total Dust
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-6 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Soapstone, Respirable Dust
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-3 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation
Talc (containing asbestos): use asbestos limit: See 29 CRF 1910.1001
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
Talc (containing no asbestos), respirable dust CAS NO(f): 14807-96-6
Transitional Limits:
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
TWA-2 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Tremolite
Transitional Limits:See 29 CFR 1010.1101
PEL*-Tbl. Z-3
Skin Designation-
Final Rule Limits**:
SiliconCAS NO(f): 7440-21-3
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silicon carbideCAS NO(f): 409-21-2
Total Dust
Transitional Limits:
PEL*-15 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-10 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Respirable fraction
Transitional Limits:
PEL*-5 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silicon tetrahydrideCAS NO(f): 7803-62-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA5 ppm(a)7 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Silver, metal and soluble compounds (as Ag)CAS NO(f): 7440-22-4
Transitional Limits:
PEL*-0.01 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA-0.01 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Soapstone;
see Silicates
Sodium azide (as HN (3)):CAS NO(f): 26628-22-8
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING0.1 ppm(a)-
Skin DesignationX
(as NaN (3)):
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING-0.3 mg/m(3)(b)
Skin DesignationX
Sodium bisulfiteCAS NO(f): 7631-90-5
Transitional Limits:
PEL*--
Skin Designation-
Final Rule Limits**:
TWA-5 mg/m(3)(b)
STEL(c)--
CEILING--
Skin Designation-
Sodium fluoroacetateCAS NO(f): 62-74-8
Transitional Limits:
PEL*-0.05 mg/m(3)(b)
Skin DesignationX
Final Rule Limits**:
TWA-0.05 mg/m(3)(b)
STEL(c)-0.15 mg/m(3)(b)
CEILING--
Skin DesignationX
Sodium hydroxideCAS NO(f): 1310-73-2
Transitional Limits:
PEL*-2 mg/m(3)(b)
Skin Designation-
Final Rule Limits**:
TWA--
STEL(c)--
CEILING-2 mg/m(3)(b)