P420 · Precautionary statementStore separately.

Precautionary · StoragePhysical

P420 is the GHS precautionary statement “Store separately”. 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. Canada’s official French text is “Stocker séparément” and Mexico’s Spanish text is “Almacenar separadamente”. In the UN GHS Rev.11 label matrix it is used with 6 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 separately.

UN GHS Rev.11, Annex 3, Table A3.2.4, PDF p. 335

US OSHA HCS

Same as UN

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

Store separately.

29 CFR 1910.1200 App. C, matched by wording

EU CLP

Same as UN

EU_CLP_2025 · consolidated 1 Jul 2026

Store separately.

EU CLP, Annex IV, Part 2

Canada (EN)

Same as UN

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

Store separately.

GHS Rev.7 Annex 3 Table A3.2

Canada (FR)

Adopted

WHMIS_2022 · SGH Rév.7, texte officiel

Stocker séparément.

GHS Rev.7 Annex 3 Table A3.2

Mexico (ES)

Adopted

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

Almacenar separadamente

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

Hazard classes and categories

Self-reactive substances and mixtures (chapter 2.8) · Category Types A, B, C, D, E, F
Self-heating substances and mixtures (chapter 2.11) · Category 1, 2
Oxidizing liquids (chapter 2.13) · Category 1
Oxidizing solids (chapter 2.14) · Category 1
Organic peroxides (chapter 2.15) · Category Types A, B, C, D, E, F

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.

H240 H241 H242 H251 H252 H271

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

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 P420. 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.