The HazComm Standard applies to "Hazardous Chemicals."
"Hazardous chemical" means any chemical which is classified as a physical hazard or a health hazard, a simple asphyxiant, combustible dust, pyrophoric gas, or hazard not otherwise classified.
Physical hazard means a chemical that is classified as posing one of the following hazardous effects: explosive; flammable (gases, aerosols, liquids, or solids); oxidizer (liquid, solid or gas); self-reactive; pyrophoric (liquid or solid); self-heating; organic peroxide; corrosive to metal; gas under pressure; or in contact with water emits flammable gas.
Health hazard means a chemical which is classified as posing one of the following hazardous effects: acute toxicity (any route of exposure); skin corrosion or irritation; serious eye damage or eye irritation; respiratory or skin sensitization; germ cell mutagenicity; carcinogenicity; reproductive toxicity; specific target organ toxicity (single or repeated exposure); or aspiration hazard
But there's a lot of stuff NOT covered, like hazardous waste, tobacco, food and alcohol, cosmetics, consumer products used for their intended purpose in their intended manner, and others.
Read about it here:
https://www.osha.gov/pls/oshaweb/ow...NDARDS&p_unique_file=1910_1200&p_anchor_name=