P304+P340 · Precautionary statementIF INHALED: Remove person to fresh air and keep comfortable for breathing.

Precautionary · ResponseHealthCombinedChanged in Rev.11

P304+P340 is the GHS precautionary statement “IF INHALED: Remove person to fresh air and keep comfortable for breathing”. UN GHS Annex 3 assigns it to 5 hazard classes. The English wording is the same as UN GHS Rev.11 in US OSHA, EU CLP and Canada. Mexico’s Spanish text is “En caso de inhalación, transportar la persona al aire libre y mantenerla en una posición que le facilite la respiración”. In the UN GHS Rev.11 label matrix it is used with 8 hazard statements (UN only). Changed in UN GHS Rev.11: hazard classes/categories changed.

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

IF INHALED: Remove person to fresh air and keep comfortable for breathing.

UN GHS Rev.11, Annex 3, Table A3.2.3, PDF p. 329

US OSHA HCS

Same as UN

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

If inhaled: Remove person to fresh air and keep comfortable for breathing.

29 CFR 1910.1200 App. C, matched by wording

EU CLP

Same as UN

EU_CLP_2025 · consolidated 1 Jul 2026

IF INHALED: Remove person to fresh air and keep comfortable for breathing.

EU CLP, Annex IV, Part 2

Canada (EN)

Same as UN

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

IF INHALED: Remove person to fresh air and keep comfortable for breathing.

GHS Rev.7 Annex 3 Table A3.2

Canada (FR)

Adopted

WHMIS_2022 · SGH Rév.7, texte officiel

EN CAS D'INHALATION: Transporter la personne à l'extérieur et la maintenir dans une position où elle peut confortablement respirer.

GHS Rev.7 Annex 3 Table A3.2

Mexico (ES)

Adopted

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

En caso de inhalación, transportar la persona al aire libre y mantenerla en una posición que le facilite la respiración

NOM-018-STPS-2015, DOF 9 October 2015, Apéndice D, Tabla D.1, PDF p. 37

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

H statements it is used with in the UN GHS Rev.11 label matrix only

UN GHS Rev.11 only. EU CLP, US OSHA, Canada (GHS Rev.7) and Mexico assign their own P statements; check the regulation for your market.

H314 H330 H331 H332 H333 H334 H335 H336

UN GHS Rev.11 Annex 3, section 3. Listed for at least one category that uses each H statement.

Related codes

P304 P340

Change in UN GHS Rev.11

Changed from Rev.10: hazard classes/categories changed.

Rev.10 only:

Acute toxicity, inhalation (chapter 3.1): 1, 2, 3, 4

Rev.11:

Acute toxicity, inhalation (chapter 3.1): 1, 2, 3, 4, 5

Sources

Each cell in the table names the official table and page for P304+P340. 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.