GHS hazard statement
H270: May cause or intensify fire; oxidizer
- H270
- Physical hazards
- Danger
H270 means “May cause or intensify fire; oxidizer”. It is a GHS hazard statement for Oxidizing gases (Category 1), shown with GHS03 under the signal word “Danger”.
Hazard class and category
| Hazard class | Category | Pictogram | Signal word | UN transport class |
|---|---|---|---|---|
| Oxidizing gases | Category 1 |  | Danger | Class 2 |
What H270 means
Oxidizing gases are gases that may, generally by providing oxygen, cause or contribute to the combustion of other material more than air does.
Materials burn much more fiercely in an oxidizing gas than in air. Grease, oil and clothing can ignite more easily.
What to do
Keep away from combustible materials and keep fittings free of oil and grease, use equipment rated for the gas, and keep cylinders secured and away from heat.
This is general guidance for the hazard class. The safety data sheet for your product always takes precedence.
Precautionary statements for H270
The GHS lists these precautionary statements for this hazard. Which ones appear on a label depends on the supplier's classification.
Chemicals carrying H270
2 chemicals in our database. Classification comes from each chemical's primary GHS source, so a supplier's SDS may differ.
H270 frequently asked questions
What does H270 mean?
H270 means "May cause or intensify fire; oxidizer". It is a GHS hazard statement in the physical hazards group, covering Oxidizing gases (Category 1).
Which pictogram goes with H270?
H270 is shown with GHS03 (Flame Over Circle).
What signal word goes with H270?
The signal word for H270 is "Danger".
Which precautionary statements go with H270?
The GHS data lists 4 precautionary statements for H270, including P220, P244, P370+P376, P403. They cover prevention, response, storage and disposal. The full list is on this page.
Hazard statements describe the hazard of a classified substance or mixture. The classification of a specific product can differ, so use the supplier's SDS.
https://pubchem.ncbi.nlm.nih.gov/ghs/ghscode_10.txt (UN GHS Revision 10, retrieved 2026-10-12)