WHMIS (Calcined diatomaceous silica)

Workplace Hazardous Materials Information System

WHMIS 2015 classification - Note to reader

• Carcinogenicity - Category 1A1 2
• Contains 10-20% of a carcinogenic substance: Cristobalite

• Specific target organ toxicity - repeated exposure - Category 13

Danger

May cause cancer (H350)
Causes damage to organs through prolonged or repeated exposure (H372)

Ingredient disclosure

Comments: Classification regarding specific organ toxicity - repeated exposure (H372) applies to a mixture untested for this criteria that contain at least 1% of a specific toxic for an organ - repeated exposure (Cristobalite).

References

• ▲1.  Centre canadien d'hygiène et de sécurité au travail, CHEMINFO, Hamilton, Ont. : Canadian Centre for Occupational Health and Safety   http://ccinfoweb.ccohs.ca/cheminfo/search.html
• ▲2.  IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, Silica, some silicates, coal dust and para-aramid fibrils. IARC monographs on the evaluation of carcinogenic risks to humans, Vol. 68. Lyon : International Agency for Research on Cancer. (1997).   https://monographs.iarc.fr/wp-content/uploads/2018/06/mono68.pdf
  http://www.iarc.fr
• ▲3.  American Conference of Governmental Industrial Hygienists, Documentation of the threshold limit values and biological exposure indices / Documentation of TLV's and BEI's. 7th ed. Cincinnati, Ohio : ACGIH. (2001-). Publication #0100Doc. [RM-514008]   http://www.acgih.org

The [number] refers to the Information SST database of the CNESST Documentation Center.