P334 · Precautionary statementImmerse in cool water [or wrap in wet bandages].

Precautionary · ResponsePhysical

P334 is the GHS precautionary statement “Immerse in cool water [or wrap in wet bandages]”. UN GHS Annex 3 assigns it to 3 hazard classes. The English wording is the same as UN GHS Rev.11 in EU CLP and Canada. OSHA uses it only inside combined statements. Canada’s official French text is “Rincer à l'eau fraîche[ou poser une compresse humide]” and Mexico’s Spanish text is “Sumergir en agua fría o envolver en vendas húmedas”.

Maintained by Valenc. Data checked 2026-10-20.

Heading text: UN GHS Rev.11 Annex 3. Wording can differ by jurisdiction; see the table below.

Wording by jurisdiction

UN GHS Rev.11

Same as UN

GHS Rev.11 (2025), Annex 3

Immerse in cool water [or wrap in wet bandages].

UN GHS Rev.11, Annex 3, Table A3.2.3, PDF p. 325

US OSHA HCS

In combined statements

HCS 2024 · primarily GHS Rev.7, some Rev.8

Used in OSHA App. C only inside combined statements: P302+P334, P302+P335+P334. Precautionary statements may be combined (App. C, C.2.4.6).

EU CLP

Same as UN

EU_CLP_2025 · consolidated 1 Jul 2026

Immerse in cool water [or wrap in wet bandages].

EU CLP, Annex IV, Part 2

Canada (EN)

Same as UN

WHMIS_2022 · GHS Rev.7 (Rev.8 for chemicals under pressure)

Immerse in cool water [or wrap in wet bandages].

GHS Rev.7 Annex 3 Table A3.2

Canada (FR)

Adopted

WHMIS_2022 · SGH Rév.7, texte officiel

Rincer à l'eau fraîche[ou poser une compresse humide].

GHS Rev.7 Annex 3 Table A3.2

Mexico (ES)

Adopted

NOM-018-STPS-2015 · GHS 5th revised edition

Sumergir en agua fría o envolver en vendas húmedas

NOM-018-STPS-2015, DOF 9 October 2015, Apéndice D, Tabla D.1, PDF p. 36

Hazard classes and categories

Pyrophoric liquids (chapter 2.9) · Category 1
Pyrophoric solids (chapter 2.10) · Category 1
Substances and mixtures which, in contact with water, emit flammable gases (chapter 2.12) · Category 1, 2

UN GHS Rev.11 Annex 3, sections 1 and 2

Conditions for use

text in square brackets to be used for pyrophoric liquids and solids.
use only “Immerse in cool water.” Text in square brackets should not be used.

Quoted as published in UN GHS Rev.11 Annex 3, section 2. List markers are shown as bullets.

Related codes

P302+P334 P302+P335+P334

Change in UN GHS Rev.11

No change to the wording or the hazard classes in Annex 3 compared with Rev.10.

Sources

Each cell in the table names the official table and page for P334. Full citations, links and revision notes for UN GHS Rev.11, US OSHA, EU CLP, Canada and Mexico: Sources and revision notes.

These are regulatory phrases for labels and safety data sheets. Check them against the official source for your jurisdiction before use.