CAS number
-Alternate name
quartzalpha quartz
cristobalite
tripoli
tridymite
Workplace exposure standards
- TWA
- -
- 0.025(r) mg/m3
- STEL
- -
- -
- CEILING
- -
- -
Notations
carcinogen category 1: Known or presumed human carcinogen.
- Notes
- To protect for pulmonary fibrosis (silicosis) and lung cancer.
α-Quartz and cristobalite are confirmed carcinogens.
Significant risk to workers will remain at WES-TWA exposures of 0.025mg/m³. The US Occupational Safety and Health Administration (OSHA) has estimated the lifetime silicosis mortality risk for workers exposed at this level for 8 hours per day at between 4 and 22 deaths per 1,000 workers and the lifetime lung cancer mortality risk for workers exposed at this level for 8 hours per day at between 3 and 23 deaths per 1,000 workers.
- Year adopted
- 2023
- Next review
- -
External resources
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