Physical hazard · Flammable gases

H232 — May ignite spontaneously if exposed to air

Physical hazard statements describe what the substance itself can do — explode, ignite, react, corrode metal. No substance with a harmonised EU classification carries this code.

EU CLP: currentUS OSHA HazCom: currentUS HazCom 2012: absentUN GHS: current

01 · Wording

What H232 says

Official

May ignite spontaneously if exposed to air.

Source

CLP Annex III · Physical hazards

Classification

Flammable gases GHS chapter 2.2

Category Pyrophoric · pictogram GHS02 (flame) · signal word Danger

UN GHS history

Introduced in Rev.6 (2015).

Rev.3 2009

Rev.4 2011

Rev.5 2013

Rev.6 2015

Rev.7 2017

Rev.8 2019

Rev.9 2021

Rev.10 2023

Rev.11 2025

added in Rev.6 (2015)

Added by UN GHS Rev.6 and unchanged through Rev.11 (2025). Jurisdictions that sit on an earlier revision do not have this code at all.

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

H232 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 H232
BG български Bulgarian	Може да се запали спонтанно при контакт с въздух.
ES español Spanish	Puede inflamarse espontáneamente en contacto con el aire.
CS čeština Czech	Při styku se vzduchem se může samovolně vznítit.
DA dansk Danish	Kan selvantænde ved kontakt med luft.
DE Deutsch German	Kann sich bei Kontakt mit Luft spontan entzünden.
ET eesti Estonian	Kokkupuutel õhuga võib süttida iseenesest.
EL ελληνικά Greek	Ενδέχεται να αυτοαναφλεγεί εάν εκτεθεί στον αέρα.
EN English English	May ignite spontaneously if exposed to air.
FR français French	Peut s'enflammer spontanément au contact de l'air.
GA Gaeilge Irish	D'fhéadfadh an ní uathadhaint i gcás nochtadh don aer.
HR hrvatski Croatian	Može se spontano zapaliti u dodiru sa zrakom.
IT italiano Italian	Spontaneamente infiammabile all'aria.
LV latviešu Latvian	Saskarē ar gaisu var spontāni aizdegties.
LT lietuvių Lithuanian	Ore gali užsidegti savaime.
HU magyar Hungarian	Levegővel érintkezve öngyulladásra hajlamos.
MT Malti Maltese	Jista' jieħu n-nar spontanjament jekk ikun espost għall-arja.
NL Nederlands Dutch	Kan spontaan ontbranden bij blootstelling aan lucht.
PL polski Polish	Może ulegać samozapaleniu w przypadku wystawienia na działanie powietrza.
PT português Portuguese	Pode inflamar-se espontaneamente em contacto com o ar.
RO română Romanian	Se poate aprinde spontan dacă intră în contact cu aerul.
SK slovenčina Slovak	Pri kontakte so vzduchom sa môže spontánne vznietit.
SL slovenščina Slovenian	V stiku z zrakom lahko pride do samodejnega vžiga.
FI suomi Finnish	Voi syttyä itsestään palamaan joutuessaan kosketuksiin ilman kanssa.
SV svenska Swedish	Kan spontanantända vid kontakt med luft.

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 H232 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 H232
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	not in this system
UN GHS	Rev.11 (2025) UN GHS Rev.11, Annex 3	Current

Currently in force under: EU CLP, US OSHA HazCom, UN GHS. Sources: EU CLP · US OSHA HazCom · US HazCom 2012 · UN GHS

04 · Substances

Substances carrying H232

No substance with a harmonised classification in CLP Annex VI carries this code. That does not mean it is unused — suppliers apply it to their own mixtures.

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).

SDS Manager

A hazard statement is not chosen — it follows from the classification, and the same code then has to stand in section 2 of the safety data sheet and on the label, in the official wording of every language the product is sold in. For doing that once and keeping it current when a classification changes, the solution we recommend is SDS Manager (ExactSDS). It also offers SDS management and a broader EHS suite.

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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.