H271 — May cause fire or explosion; strong oxidizer
The GHS hazard statement for oxidizing liquids and solids, category 1. Here is what it means, the label elements that travel with it, and the substances that carry it.
What it means
Chemicals that feed a fire with oxygen. They are not necessarily combustible themselves, but they can make other materials ignite more easily and burn more intensely.
Precautionary statements paired with H271
When the engine writes SDS Section 2 or a container label for a product carrying H271, these are the P-codes it assigns, in the official Annex 3 groups:
Substances that carry H271
15 of the 4,228 substances in our database carry H271 when classified in pure form — recognizable examples:
Reference information, not legal or professional advice. Statement texts and allocations follow GHS Rev 9 / 29 CFR 1910.1200 Appendix C as implemented by our classification engine; the regulatory text and agency practice control. Claims last reviewed July 23, 2026.
The engine writes these for you.
When SDS HQ authors an SDS or a container label, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.