What is a “hazardous chemical”?

OSHA’s Hazard Communication Standard defines hazardous chemical as “any chemical that is classified as a physical hazard or a health hazard, simple asphyxiant, combustible dust, or hazard not otherwise classified.” It includes chemicals in all physical forms, such as liquids, solids, gases, vapors, fumes, and mists, regardless of whether they are contained or not.

The hazardous nature of the chemical and the potential for exposure are the factors that determine whether a chemical is covered under the HazCom standard. If a chemical is not hazardous, it is not covered. Additionally, if there is no potential for exposure, such as when the chemical is inextricably bound and cannot be released, the rule does not cover the chemical.