(a) Chemical name means the scientific designation of a substance in accordance with the nomenclature developed by the International Union of Pure and Applied Chemistry or by the Chemical Abstracts Service.

(b) Employee includes all regular and temporary, full-time and part-time employees, former employees employed after the effective date of Labor Law, article 28, and employees on lay-off and leaves of absence for any reason, but does not include domestic workers or casual laborers employed at their employers' place of residence.

(c) Exposure or exposed means being subjected to a toxic substance through any actual or potential route of entry, including inhalation, ingestion, injection, skin contact or absorption, for any period of time, even if such exposure is accidental or if actual exposure is being prevented in whole or in part by the use of protective devices.

(d) Hazardous means causing, potentially causing, or contributing to an acute or chronic illness or any other risk to health or life.

(e) Routine exposure means exposure (as defined in subdivision [c] of this section) which can be expected to occur in the course of employment as part of an employee's job duties or incidental thereto.

(f) Trade name means any designation or identification of a chemical or combination of chemicals, such as a common name, code name, code number or brand name, used to identify a chemical or combination of chemicals other than by their chemical names.

(g) Substantial number means 10 employees or 20 percent of the total number of employees, whichever number is lower.

(h) As used in these regulations, the terms employer, toxic substance and workplace have the same meaning as provided in Labor Law, section 875.