Provenance

Reference data from EU CLP Annex VI and published regulations — verify against your supplier's SDS before use.

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Health hazard · Acute toxicity - inhalation

H331 — Toxic if inhaled

Health hazard statements describe what the substance does to a person exposed to it. 210 substances with a harmonised EU classification carry this code.

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

01 · Wording

What H331 says

Official

Toxic if inhaled.

Source

CLP Annex III · Health hazards

Classification
GHS06 pictogram — skull and crossbones

Acute toxicity - inhalation GHS chapter 3.1

Category 3 · pictogram GHS06 (skull and crossbones) · signal word Danger

UN GHS history

Unchanged since 2009.

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
wording never changed

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

H331 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.

LanguageOfficial wording of H331
BG български Bulgarian Токсичен при вдишване.
ES español Spanish Tóxico en caso de inhalación.
CS čeština Czech Toxický při vdechování.
DA dansk Danish Giftig ved indånding.
DE Deutsch German Giftig bei Einatmen.
ET eesti Estonian Sissehingamisel mürgine.
EL ελληνικά Greek Τοξικό σε περίπτωση εισπνοής.
EN English English Toxic if inhaled.
FR français French Toxique par inhalation.
GA Gaeilge Irish Tocsaineach má ionanálaítear.
HR hrvatski Croatian Otrovno ako se udiše.
IT italiano Italian Tossico se inalato.
LV latviešu Latvian Toksisks ieelpojot.
LT lietuvių Lithuanian Toksiška įkvėpus.
HU magyar Hungarian Belélegezve mérgező.
MT Malti Maltese Tossiku jekk jinxtamm.
NL Nederlands Dutch Giftig bij inademing.
PL polski Polish Działa toksycznie w następstwie wdychania.
PT português Portuguese Tóxico por inalação.
RO română Romanian Toxic în caz de inhalare.
SK slovenčina Slovak Toxický pri vdýchnutí.
SL slovenščina Slovenian Strupeno pri vdihavanju.
FI suomi Finnish Myrkyllistä hengitettynä.
SV svenska Swedish Giftigt vid inandning.

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 H331 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.

JurisdictionBasisStatus of H331
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 · On a label

H331 also appears combined

CLP Annex III defines combined hazard statements as single label elements. H331 is a component of 3 of them — this is how you will actually see it printed. The combinations have no pages of their own: a plus sign in a URL has to be encoded and breaks in other people's links and in analytics.

CodeCombined statement
H301+H331 Toxic if swallowed or if inhaled. CLP verbatim: Toxic if swallowed or if inhaled
H311+H331 Toxic in contact with skin or if inhaled. CLP verbatim: Toxic in contact with skin or if inhaled
H301+H311+H331 Toxic if swallowed, in contact with skin or if inhaled. CLP verbatim: Toxic if swallowed, in contact with skin or if inhaled

05 · Substances

Substances carrying H331

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. Of these, 17 are group entries such as “salts of picric acid” or “beryllium compounds” — Annex VI gives them no CAS number, so they are listed by Index No and have no page of their own.

210 of 210 shown

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.

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