H271 · Hazard statementMay cause fire or explosion; strong oxidizer

Hazard statementPhysicalDiffers: EU

H271 is the GHS hazard statement “May cause fire or explosion; strong oxidizer”. It is used for Oxidizing liquids (chapter 2.13), Category 1 and Oxidizing solids (chapter 2.14), Category 1. The English wording is the same as UN GHS Rev.11 in US OSHA and Canada. The wording differs in EU CLP. Canada’s official French text is “Peut provoquer un incendie ou une explosion ; comburant puissant” and Mexico’s Spanish text is “Puede provocar un incendio o una explosión; muy comburente”. The UN GHS Rev.11 label matrix lists 9 precautionary statements for it (UN only).

Maintained by Valenc. Data checked 2026-10-20.

Heading text: UN GHS Rev.11 Annex 3. Wording can differ by jurisdiction; see the table below.

Wording by jurisdiction

UN GHS Rev.11

Same as UN

GHS Rev.11 (2025), Annex 3

May cause fire or explosion; strong oxidizer

UN GHS Rev.11, Annex 3, Table A3.1.1, PDF p. 303

US OSHA HCS

Same as UN

HCS 2024 · primarily GHS Rev.7, some Rev.8

May cause fire or explosion; strong oxidizer

29 CFR 1910.1200 App. C, matched by wording

EU CLP

Differs

EU_CLP_2025 · consolidated 1 Jul 2026

May cause fire or explosion; strong oxidiser.

EU CLP (Reg. (EC) No 1272/2008), Annex III, Part 1

Canada (EN)

Same as UN

WHMIS_2022 · GHS Rev.7 (Rev.8 for chemicals under pressure)

May cause fire or explosion; strong oxidizer

GHS Rev.7 Annex 3 Table A3.1

Canada (FR)

Adopted

WHMIS_2022 · SGH Rév.7, texte officiel

Peut provoquer un incendie ou une explosion ; comburant puissant

GHS Rev.7 Annex 3 Table A3.1

Mexico (ES)

Adopted

NOM-018-STPS-2015 · GHS 5th revised edition

Puede provocar un incendio o una explosión; muy comburente

Líquidos comburentes, Sólidos comburentes · 1

NOM-018-STPS-2015, DOF 9 October 2015, Apéndice C, Tabla C.1, PDF p. 30

Hazard classes and categories

Oxidizing liquids (chapter 2.13) · Category 1
Oxidizing solids (chapter 2.14) · Category 1

UN GHS Rev.11 Annex 3, sections 1 and 2

FRLiquides comburants (chapitre 2.13) ; Matières solides comburantes (chapitre 2.14) · catégorie 1

ESLíquidos comburentes, Sólidos comburentes · 1 (NOM-018-STPS-2015)

Pictogram: Flame over circle (GHS03)

UN GHS Rev.11 Annex 3, section 3. Pictogram rules can differ by jurisdiction; see the GHS pictogram guide.

P statements in the UN GHS Rev.11 label matrix only

UN GHS Rev.11 only. EU CLP, US OSHA, Canada (GHS Rev.7) and Mexico assign different P statements; check the regulation for your market.

Oxidizing liquids (chapter 2.13), categories 1 (PDF p. 366)
P210 P220 P280 P283 P420 P501 P306+P360 P370+P378 P371+P380+P375
Oxidizing solids (chapter 2.14), categories 1 (PDF p. 368)
P210 P220 P280 P283 P420 P501 P306+P360 P370+P378 P371+P380+P375

UN GHS Rev.11 Annex 3, section 3. Each table covers the categories named; a P statement may apply to only some of them. Many apply only under conditions; check the conditions for use before putting them on a label.

Related codes

H272

Change in UN GHS Rev.11

No change to the wording or the hazard classes in Annex 3 compared with Rev.10.

Sources

Each cell in the table names the official table and page for H271. Full citations, links and revision notes for UN GHS Rev.11, US OSHA, EU CLP, Canada and Mexico: Sources and revision notes.

These are regulatory phrases for labels and safety data sheets. Check them against the official source for your jurisdiction before use.