Physical hazard · Explosives

H205 — May mass explode in fire

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EU CLP: currentUS OSHA HazCom: currentUS HazCom 2012: currentUN GHS: withdrawn

01 · Wording

What H205 says

Official

May mass explode in fire.

Source

CLP Annex III · Physical hazards

Classification

Explosives GHS chapter 2.1

Category 1.5 · signal word Danger

UN GHS history

Deleted from UN GHS in Rev.9 (2021) — still current in CLP.

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

deleted in Rev.9 (2021)

UN GHS Rev.9 marked this code [Deleted]. EU CLP has not followed: the code is legally current on an EU label today. This is the single most common reason a code looks wrong in one reference and right in another.

The UN replacement is H209, a code that is not part of EU CLP.

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

H205 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 H205
BG български Bulgarian	Може да предизвика масова експлозия при пожар.
ES español Spanish	Peligro de explosión en masa en caso de incendio.
CS čeština Czech	Při požáru může způsobit masivní výbuch.
DA dansk Danish	Fare for masseeksplosion ved brand.
DE Deutsch German	Gefahr der Massenexplosion bei Feuer.
ET eesti Estonian	Süttimise korral massiplahvatusoht.
EL ελληνικά Greek	Κίνδυνος μαζικής έκρηξης σε περίπτωση πυρκαγιάς.
EN English English	May mass explode in fire.
FR français French	Danger d'explosion en masse en cas d'incendie.
GA Gaeilge Irish	D'fhéadfadh sé go mbeadh mórphléascadh i dtine.
HR hrvatski Croatian	U vatri može izazvati eksploziju ogromnih razmjera.
IT italiano Italian	Pericolo di esplosione di massa in caso d'incendio.
LV latviešu Latvian	Ugunī var masveidā eksplodēt.
LT lietuvių Lithuanian	Per gaisrą gali sukelti masinį sprogimą.
HU magyar Hungarian	Tűz hatására a teljes tömeg felrobbanhat.
MT Malti Maltese	Jista' jisplodi f'daqqa fin-nar.
NL Nederlands Dutch	Gevaar voor massa-explosie bij brand.
PL polski Polish	Może wybuchać masowo w przypadku pożaru.
PT português Portuguese	Perigo de explosão em massa em caso de incêndio.
RO română Romanian	Pericol de explozie în masă în caz de incendiu.
SK slovenčina Slovak	Nebezpečenstvo rozsiahleho výbuchu pri požiari.
SL slovenščina Slovenian	Pri požaru lahko eksplodira v masi.
FI suomi Finnish	Koko massa voi räjähtää tulessa.
SV svenska Swedish	Fara för massexplosion vid brand.

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 H205 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 H205
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	withdrawn Current equivalent: H209.

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

04 · Substances

Substances carrying H205

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.