Provenance

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

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Response · precautionary statement

P304 — IF INHALED:

Response statements describe what to do once exposure, a spill or a fire has happened. 703 substances with a harmonised EU classification carry this code.

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

01 · Wording

What P304 says

Official

IF INHALED:

Category

Response · GHS revision 9

Where P304 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 P304
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

03 · On a label

P304 usually appears combined

CLP Annex IV defines combined statements as single label elements. P304 is a component of one of them — this is how you will actually see it printed.

CodeCombined statement
P304+P340 IF INHALED: remove person to fresh air and keep comfortable for breathing. CLP verbatim: IF INHALED: Remove person to fresh air and keep comfortable for breathing.

Substances carrying P304

Every entry whose harmonised CLP Annex VI classification includes this precautionary statement. Substances with a reference page here open on this site; the rest open on ghssymbols.com. Of these, 59 are group entries such as “beryllium compounds” or “salts of hydrazine” — Annex VI gives them no CAS number, so they are listed by Index No and have no page of their own.

703 of 703 shown

Nothing matches that filter.

All precautionary statements

The full list of P-codes with the jurisdiction switch lives on the precautionary statements hub. For the hazard side, see hazard statements (H-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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