Physical hazard · Flammable gases

H230 — May react explosively even in the absence of 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 H230 says

Official

May react explosively even in the absence of air.

Source

CLP Annex III · Physical hazards

Classification

Flammable gases GHS chapter 2.2

Category Chemically unstable A · pictogram GHS02 (flame) · signal word Danger

UN GHS history

Introduced in Rev.4 (2011).

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.4 (2011)

Added by UN GHS Rev.4 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

H230 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 H230
BG български Bulgarian	Може да реагира експлозивно дори при отсъствие на въздух.
ES español Spanish	Puede explotar incluso en ausencia de aire.
CS čeština Czech	Může reagovat výbušně i bez přítomnosti vzduchu.
DA dansk Danish	Kan reagere eksplosivt selv i fravær af luft.
DE Deutsch German	Kann auch in Abwesenheit von Luft explosionsartig reagieren.
ET eesti Estonian	Võib reageerida plahvatuslikult isegi õhuga kokku puutumata.
EL ελληνικά Greek	Δύναται να εκραγεί ακόμη και απουσία αέρος.
EN English English	May react explosively even in the absence of air.
FR français French	Peut exploser même en l’absence d’air.
GA Gaeilge Irish	D’fhéadfadh sé imoibriú go pléascach fiú mura bhfuil aer ann.
HR hrvatski Croatian	Može eksplozivno reagirati i bez prisustva zraka.
IT italiano Italian	Può esplodere anche in assenza di aria.
LV latviešu Latvian	Var eksplodēt pat bezgaisa vidē.
LT lietuvių Lithuanian	Gali sprogti net ir nesant oro.
HU magyar Hungarian	Még levegő hiányában is robbanásszerű reakcióba léphet.
MT Malti Maltese	Jista jisplodi anke fin-nuqqas ta’ l-arja.
NL Nederlands Dutch	Kan explosief reageren zelfs in afwezigheid van lucht.
PL polski Polish	Może reagować wybuchowo nawet bez dostępu powietrza.
PT português Portuguese	Pode reagir explosivamente mesmo na ausência de ar.
RO română Romanian	Pericol de explozie, chiar si in absenta aerului.
SK slovenčina Slovak	Môže reagovať výbušne aj bez prítomnosti vzduchu.
SL slovenščina Slovenian	Lahko reagira eksplozivno tudi v odsotnosti zraka.
FI suomi Finnish	Voi reagoida räjähtäen jopa ilmattomassa tilassa.
SV svenska Swedish	Kan reagera explosivt även i frånvaro av 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 H230 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 H230
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 H230

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.