P403+P235 · Precautionary statementStore in a well-ventilated place. Keep cool.

Precautionary · StoragePhysicalCombined

P403+P235 is the GHS precautionary statement “Store in a well-ventilated place. Keep cool”. UN GHS Annex 3 assigns it to Flammable liquids (chapter 2.6), Category 1, 2, 3. The English wording is the same as UN GHS Rev.11 in US OSHA, EU CLP and Canada. Canada’s official French text is “Stocker dans un endroit bien ventilé. Tenir au frais” and Mexico’s Spanish text is “Almacenar en un lugar bien ventilado. Mantener fresco”. In the UN GHS Rev.11 label matrix it is used with 3 hazard statements (UN only).

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

Store in a well-ventilated place. Keep cool.

UN GHS Rev.11, Annex 3, Table A3.2.4, PDF p. 336

US OSHA HCS

Same as UN

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

Store in a well-ventilated place. Keep cool.

29 CFR 1910.1200 App. C, matched by wording

EU CLP

Same as UN

EU_CLP_2025 · consolidated 1 Jul 2026

Store in a well-ventilated place. Keep cool.

EU CLP, Annex IV, Part 2

Canada (EN)

Same as UN

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

Store in a well-ventilated place. Keep cool.

GHS Rev.7 Annex 3 Table A3.2

Canada (FR)

Adopted

WHMIS_2022 · SGH Rév.7, texte officiel

Stocker dans un endroit bien ventilé. Tenir au frais.

GHS Rev.7 Annex 3 Table A3.2

Mexico (ES)

Adopted

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

Almacenar en un lugar bien ventilado. Mantener fresco

NOM-018-STPS-2015, DOF 9 October 2015, Apéndice D, Tabla D.1, PDF p. 38

Hazard classes and categories

Flammable liquids (chapter 2.6) · Category 1, 2, 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.

H224 H225 H226

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

Conditions for use

for flammable liquids Category 1 and other flammable liquids that are volatile and may generate an explosive atmosphere.

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

Related codes

P403 P235

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 P403+P235. 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.