GHS hazard statement
H221
Flammable gas
GHS02 · Flame- Hazard group
- Physical hazards
- Hazard class
- Flammable gas
- Signal word
- Warning
What H221 means
H221 is the GHS (Globally Harmonized System) hazard statement “Flammable gas.” It belongs to the Flammable gas hazard class and appears in Section 2 of a Safety Data Sheet and on the product label when a substance or mixture meets the classification criteria for that class and category.
Where H221 applies, GHS assigns the signal word Warning and the GHS02 (Flame) pictogram. The exact signal word and pictogram set on a finished label come from the whole classification — the most severe endpoint drives the signal word, so a milder statement can be present without changing an already-Danger label.
Related statements — Flammable gas
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Reference information, not a compliance determination. Actual label elements depend on the full classification of your specific substance or mixture and require review by a qualified professional.