P407 · Precautionary statementMaintain air gap between stacks or pallets.
P407 is the GHS precautionary statement “Maintain air gap between stacks or pallets”. UN GHS Annex 3 assigns it to Self-heating substances and mixtures (chapter 2.11), Category 1, 2. The English wording is the same as UN GHS Rev.11 in US OSHA, EU CLP and Canada. Canada’s official French text is “Maintenir un intervalle d'air entre les piles ou les palettes” and Mexico’s Spanish text is “Dejar un espacio de aire entre pilas o bandejas”. In the UN GHS Rev.11 label matrix it is used with 2 hazard statements (UN only).
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 UNMaintain air gap between stacks or pallets.
UN GHS Rev.11, Annex 3, Table A3.2.4, PDF p. 334
US OSHA HCS
Same as UNMaintain air gap between stacks or pallets.
29 CFR 1910.1200 App. C, matched by wording
EU CLP
Same as UNMaintain air gap between stacks or pallets.
EU CLP, Annex IV, Part 2
Canada (EN)
Same as UNMaintain air gap between stacks or pallets.
GHS Rev.7 Annex 3 Table A3.2
Canada (FR)
AdoptedMaintenir un intervalle d'air entre les piles ou les palettes
GHS Rev.7 Annex 3 Table A3.2
Mexico (ES)
AdoptedDejar un espacio de aire entre pilas o bandejas
NOM-018-STPS-2015, DOF 9 October 2015, Apéndice D, Tabla D.1, PDF p. 38
Hazard classes and categories
- Self-heating substances and mixtures (chapter 2.11) · Category 1, 2
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 P407. 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.