H272 — May intensify fire; oxidizer
The GHS hazard statement for oxidizing liquids and solids, categories 2 and 3. Here is what it means, the label elements that travel with it, and the substances that carry it.
At a glance
| Official statement | May intensify fire; oxidizer. |
| Hazard class | Oxidizing liquids and solids |
| Category | Categories 2 and 3 |
| Signal word | Danger (Category 2) / Warning (Category 3) |
| Pictogram |  GHS03 — Flame over circle |
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 H272
When the engine writes SDS Section 2 or a container label for a product carrying H272, these are the P-codes it assigns, in the official Annex 3 groups:
| Prevention | P210 | Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. |
| P220 | Keep away from clothing and other combustible materials. | |
| P280 | Wear protective gloves/protective clothing/eye protection/face protection. | |
| Disposal | P501 | Dispose of contents/container in accordance with local/regional/national/international regulations. |
Substances that carry H272
7 of the 4,225 substances in our database carry H272 when classified in pure form — recognizable examples:
- nitric acid [C ≤ 70 %] — CAS 7697-37-2
- Magnesium nitrate — CAS 10377-60-3
- Potassium nitrate — CAS 7757-79-1
- Sodium chlorite — CAS 7758-19-2
Same hazard class: H271
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.