Physical hazard · Flammable gases
H221 — Flammable gas
Physical hazard statements describe what the substance itself can do — explode, ignite, react, corrode metal. 1 substances with a harmonised EU classification carry this code.
01 · Wording
What H221 says
Flammable gas.
CLP Annex III · Physical hazards
Flammable gases GHS chapter 2.2
Categories 1B, 2 · pictogram GHS02 (flame) · signal word Danger or Warning
By category: 1B — GHS02, Danger; 2 — no pictogram, Warning
Unchanged since 2009.
Present in every UN GHS edition from Rev.3 (2009) to Rev.11 (2025), with the same wording throughout.
Nine editions of the UN model text, 86 hazard statements, 19 of which ever moved. Read the full story in what changed in UN GHS Rev.11.
02 · Languages
H221 in the 24 official EU languages
A label put on the market in an EU country must carry the wording of that country's own language version of CLP — not a translation of the English one. These 24 lines are quoted from the consolidated regulation, Annex III, and are the text to print.
| Language | Official wording of H221 |
|---|---|
| BG български Bulgarian | Запалим газ. |
| ES español Spanish | Gas inflamable. |
| CS čeština Czech | Hořlavý plyn. |
| DA dansk Danish | Brandfarlig gas. |
| DE Deutsch German | Entzündbares Gas. |
| ET eesti Estonian | Tuleohtlik gaas. |
| EL ελληνικά Greek | Εύφλεκτο αέριο. |
| EN English English | Flammable gas. |
| FR français French | Gaz inflammable. |
| GA Gaeilge Irish | Gás inadhainte. |
| HR hrvatski Croatian | Zapaljivi plin. |
| IT italiano Italian | Gas infiammabile. |
| LV latviešu Latvian | Uzliesmojoša gāze. |
| LT lietuvių Lithuanian | Degios dujos. |
| HU magyar Hungarian | Tűzveszélyes gáz. |
| MT Malti Maltese | Gass li jaqbad. |
| NL Nederlands Dutch | Ontvlambaar gas. |
| PL polski Polish | Gaz łatwopalny. |
| PT português Portuguese | Gás inflamável. |
| RO română Romanian | Gaz inflamabil. |
| SK slovenčina Slovak | Horľavý plyn. |
| SL slovenščina Slovenian | Vnetljiv plin. |
| FI suomi Finnish | Syttyvä kaasu. |
| SV svenska Swedish | Brandfarlig gas. |
Source: CELEX:02008R1272-20260501, Annex III. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic. Irish is one of the 24 official languages and its H and P texts are printed inside the multilingual Annex tables, but no consolidated CLP has ever been published in Irish — which is why an Irish-primary label cannot be built here.
03 · Legal status
Where H221 is current
GHS is a United Nations model text, revised every two years, and each jurisdiction adopts a revision on its own timetable. A code can be legally current in one system and deleted in another — that is normal, not an error.
| Jurisdiction | Basis | Status of H221 |
|---|---|---|
| EU CLP | Regulation (EC) 1272/2008 CLP Annex IV, Part 2 (consolidated) | Current |
| US OSHA HazCom | 29 CFR 1910.1200 Appendix C UN GHS Rev.7 (final rule of 20 May 2024) | Current |
| US HazCom 2012 | legacy · GHS Rev.3 UN GHS Rev.3, Annex 3 | Current |
| UN GHS | Rev.11 (2025) UN GHS Rev.11, Annex 3 | Current |
Currently in force under: EU CLP, US OSHA HazCom, US HazCom 2012, UN GHS. Sources: EU CLP · US OSHA HazCom · US HazCom 2012 · UN GHS
04 · Substances
Substances carrying H221
Every entry whose harmonised CLP Annex VI classification includes this hazard statement. Substances with a reference page here open on this site; the rest open on ghssymbols.com.
Nothing matches that filter.
All hazard statements
The full list of H-codes with the jurisdiction switch lives on the hazard statements hub. For what to do about the hazard, see precautionary statements (P-codes).
Wording quoted from the regulation named above. Substance counts come from harmonised classifications in CLP Annex VI — the statements on a real product also depend on the supplier's own classification. Always check the supplier safety data sheet.