P304 · Precautionary statementIF INHALED:
P304 is the GHS precautionary statement “IF INHALED:”. UN GHS Annex 3 assigns it to 5 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 “EN CAS D'INHALATION:” and Mexico’s Spanish text is “En caso de inhalación”.
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 UNIF INHALED:
UN GHS Rev.11, Annex 3, Table A3.2.3, PDF p. 322
US OSHA HCS
In combined statementsUsed in OSHA App. C only inside combined statements: P304+P340. Precautionary statements may be combined (App. C, C.2.4.6).
EU CLP
Same as UNIF INHALED:
EU CLP, Annex IV, Part 2
Canada (EN)
Same as UNIF INHALED:
GHS Rev.7 Annex 3 Table A3.2
Canada (FR)
AdoptedEN CAS D'INHALATION:
GHS Rev.7 Annex 3 Table A3.2
Mexico (ES)
AdoptedEn caso de inhalación
NOM-018-STPS-2015, DOF 9 October 2015, Apéndice D, Tabla D.1, PDF p. 36
Hazard classes and categories
- Acute toxicity, inhalation (chapter 3.1) · Category 1, 2, 3, 4, 5
- Skin corrosion (chapter 3.2) · Category 1, 1A, 1B, 1C
- Respiratory sensitization (chapter 3.4) · Category 1, 1A, 1B
- Specific target organ toxicity, single exposure; respiratory tract irritation (chapter 3.8) · Category 3
- Specific target organ toxicity, single exposure; narcotic effects (chapter 3.8) · Category 3
UN GHS Rev.11 Annex 3, sections 1 and 2
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 P304. 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.