P308 · Precautionary statementIF exposed or concerned:

Precautionary · ResponseHealth

P308 is the GHS precautionary statement “IF exposed or concerned:”. UN GHS Annex 3 assigns it to Specific target organ toxicity, single exposure (chapter 3.8), Category 1, 2. 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 “EN CAS d'exposition prouvée ou suspectée:” and Mexico’s Spanish text is “En caso de exposición demostrada o supuesta”.

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

IF exposed or concerned:

UN GHS Rev.11, Annex 3, Table A3.2.3, PDF p. 322

US OSHA HCS

In combined statements
HCS 2024 · primarily GHS Rev.7, some Rev.8

Used in OSHA App. C only inside combined statements: P308+P311, P308+P313. Precautionary statements may be combined (App. C, C.2.4.6).

EU CLP

Same as UN
EU_CLP_2025 · consolidated 1 Jul 2026

IF exposed or concerned:

EU CLP, Annex IV, Part 2

Canada (EN)

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

IF exposed or concerned:

GHS Rev.7 Annex 3 Table A3.2

Canada (FR)

Adopted
WHMIS_2022 · SGH Rév.7, texte officiel

EN CAS d'exposition prouvée ou suspectée:

GHS Rev.7 Annex 3 Table A3.2

Mexico (ES)

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

En caso de exposición demostrada o supuesta

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

Hazard classes and categories

  • Specific target organ toxicity, single exposure (chapter 3.8) · Category 1, 2

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

Related codes

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 P308. 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.

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