Direct answer: Turn a versioned formulation into reproducible Canadian hazard decisions.
Freeze the formulation
Require supplier grade plus minimum and maximum concentration for every line.
Normalize without losing context
Public identifiers do not replace grade, impurity or stabilizer information.
Select the method per endpoint
Tests, bridging principles, mixture data or component calculations may apply differently.
Preserve uncertainty
Do not turn broad supplier ranges into unsupported exact values.
Approve the bilingual result
Classification is language-neutral; its English and French communication outputs should be generated after approval.
Practical example
A cleaner uses a blend at 4–7%. The assessment records whether the upper bound controls a specific endpoint and prevents silent use of the midpoint.
Release checklist
- Version the formula
- Require concentration min and max
- Attach supplier SDSs
- Record method per endpoint
- Approve bilingual outputs
Common mistakes
- Adding ingredient classifications
- Using guessed midpoint concentrations
- Copying EU CLP thresholds
Frequently asked questions
Are HPR and OSHA methods identical?
No. Use the current Canadian regulations and guidance.
Do ingredient hazards automatically transfer?
No. Apply the relevant mixture method.
Why require ranges?
They preserve formulation uncertainty and allow explicit worst-case decisions.
What triggers reassessment?
Changes to formula, grade, form, evidence or regulatory basis.
Primary sources
Review notice: CANADIAN REGULATORY AND FRENCH TERMINOLOGY REVIEW REQUIRED BEFORE INDEXING.