CA-CD1b · WHMIS Hazard statementMay form explosible dust-air mixture
CA-CD1b is a WHMIS hazard statement from the Hazardous Products Regulations: “May form explosible dust-air mixture”. The Regulations give it no code; CA-CD1b is the ID used on this site. It is used for Combustible Dusts, Category 1. Listed in US OSHA and Canada. Canada’s official French text is “Peut former un mélange explosible de poussières et d’air”.
Heading text: Canada HPR. Wording can differ by jurisdiction; see the table below.
Wording by jurisdiction
UN GHS Rev.11
Not in UNWHMIS element with no GHS code, not part of the UN GHS.
US OSHA HCS
AdoptedMay form explosible dust-air mixture
Signal word: Warning
29 CFR 1910.1200 App. C, C.4.31 (label elements for OSHA defined hazards)
OSHA allows adding "[if small particles are generated during further processing, handling or by other means.]" when the dust hazard only arises from processing or handling (App. C, C.4.31).
EU CLP
Not adoptedNot listed in EU CLP Annex III or IV.
Canada (EN)
No GHS codeMay form explosible dust-air mixture
Signal word: Warning
HPR (SOR/2015-17) Schedule 5, Part 1, item 1(b)
Canada (FR)
No GHS codePeut former un mélange explosible de poussières et d’air
Mention d’avertissement : Attention
HPR (SOR/2015-17) Schedule 5, Part 1, item 1(b)
Mexico (ES)
Not adoptedNot listed in NOM-018-STPS-2015.
Hazard classes and categories
- Combustible Dusts, Category 1
Canada HPR
FRPoussières combustibles : catégorie 1
Change in UN GHS Rev.11
Not part of the UN GHS, so Rev.11 does not apply.
Notes
Canada-specific HPR wording with no GHS code. The HPR does not assign a code; "CA-CD1b" is a lookup ID used on this page only.
Sources
Each cell in the table names the official table and page for CA-CD1b. 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.