Canada has very strict rules regarding the disclosure of information on Safety Data Sheets.
Under the Workplace Hazardous Materials Information System (WHMIS) the only way to hide one’s formulation is the use of prescribed ranges. According to the Hazardous Products Regulations (HPR), Subsection 4.4.1(3):
4.4.1(3) For the purposes of paragraph (1)(b) and subsection (2), the concentration ranges are the following:
- from 0.1 to 1%;
- from 0.5 to 1.5%;
- from 1 to 5%;
- from 3 to 7%;
- from 5 to 10%;
- from 7 to 13%;
- from 10 to 30%;
- from 15 to 40%;
- from 30 to 60%;
- from 45 to 70%;
- from 60 to 80%;
- from 65 to 85%; and
- from 80 to 100%.
The only way to protect an entire ingredient(s) is to file an exemption under the Hazardous Materials Information Review Act (HMIRA).
Once one applies for the exemption, and it is granted by Health Canada, one gets a registration number and registration date that is added to the SDS in lieu of the actual information (ingredient or concentration).
Health Canada announced that it now has a new searchable webpage for claims for exemptions filed under the HMIRA. The website can be found here.
Claims filed under the HMIRA will no longer be published in the Canada Gazette.
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