The OSHA Hazard Communication Standard (HCS) is aligned with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS).
- Hazard Classes. Hazardous substances are assigned to one (or more) of nine health hazard classes and 16 physical hazard classes.
- Hazard Categories. Each Hazard Class is subdivided into Hazard Categories.
- These Categories are ranked based on hazard severity, with Category 1 as the most severe.
- Each Hazard Category has an associated Signal Word, Pictogram, Hazard Statement, and Precautionary Statement(s).
- GHS Pictograms
(these allow for a quick hazard determination)
- GHS Hazard Statements
(= standardized phrases about the hazards of a chemical)
- GHS Precautionary Statements
(= standardized phrases giving advice about the correct handling of a chemical)
- GHS Health Hazard Classes (subdivided by Hazard Categories with associated Signal Word, Hazard Statement, and Pictogram):
- GHS Physical Hazard Classes (subdivided by Hazard Categories with associated Signal Word, Hazard Statement, and Pictogram):