P234 · Precautionary statementKeep only in original packaging.

Precautionary · PreventionPhysical

P234 is the GHS precautionary statement “Keep only in original packaging”. UN GHS Annex 3 assigns it to 4 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 “Conserver uniquement dans l’emballage d'origine” and Mexico’s Spanish text is “Conservar únicamente en el recipiente original”. 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

Keep only in original packaging.

UN GHS Rev.11, Annex 3, Table A3.2.2, PDF p. 316

US OSHA HCS

Same as UN

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

Keep only in original packaging.

29 CFR 1910.1200 App. C, matched by wording

EU CLP

Same as UN

EU_CLP_2025 · consolidated 1 Jul 2026

Keep only in original packaging.

EU CLP, Annex IV, Part 2

Canada (EN)

Same as UN

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

Keep only in original packaging.

GHS Rev.7 Annex 3 Table A3.2

Canada (FR)

Adopted

WHMIS_2022 · SGH Rév.7, texte officiel

Conserver uniquement dans l’emballage d'origine.

GHS Rev.7 Annex 3 Table A3.2

Mexico (ES)

Adopted

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

Conservar únicamente en el recipiente original

NOM-018-STPS-2015, DOF 9 October 2015, Apéndice D, Tabla D.1, PDF p. 35

Hazard classes and categories

Explosives (chapter 2.1) · Category 2A, 2B, 2C
Self-reactive substances and mixtures (chapter 2.8) · Category Types A, B, C, D, E, F
Organic peroxides (chapter 2.15) · Category Types A, B, C, D, E, F
Corrosive to metals (chapter 2.16) · Category 1

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.

H204 H209 H240 H241 H242 H290

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

Conditions for use

- Omit where P236 is used.

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

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 P234. 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.