Glossary / Documents & labels
Hazard statement
A hazard statement is a standardized phrase, assigned to a hazard class and category, that describes the nature of a chemical's hazard and, where relevant, its severity. Each has a code beginning with H, such as H2xx for physical, H3xx for health, and H4xx for environmental hazards.
Explanation
Hazard statements put the hazard into plain words. Rather than just showing a symbol, the label says what the product can do, for example that it is a highly flammable liquid, that it causes skin irritation, or that it is harmful to aquatic life.
The wording is fixed so that every supplier uses the same phrase for the same classification. Labels may use the code, the text, or both, though the text is what workers actually read. The first digit of the code groups them: 2 for physical hazards, 3 for health hazards, 4 for environmental hazards.
Combined codes appear when more than one statement applies. A label may list several hazard statements in order of the classification, and the SDS repeats them in Section 2 so you can see all of them together.
Hazard statements are different from precautionary statements, which use P-codes and say what to do to prevent or respond to harm. A hazard statement says what the problem is; a precautionary statement says how to avoid it.
Each statement is tied to a hazard category, so a more severe category carries a stronger statement.
What to do and watch for
- Read the full statements, not just the codes.
- Pair each hazard statement with the matching precautionary advice.
- Check that statements on a transfer container match the original label.
Where it appears on an SDS
- Section 2: Hazard identification. Every hazard statement assigned to the product appears here, with its H-code, alongside the classification.
SDS content and wording vary by supplier. This page is general reference and does not replace the current SDS for your product.
Related terms
- Precautionary statement
- Signal word
- Pictogram
- Hazard class
- Hazard category
- Globally Harmonized System (GHS)