E-Limit

Silica, Crystalline - alpha quartz and Cristobalite, Respirable

CAS Number

1317-95-9, 14464-46-1, 14808-60-7

Last Revised

2006

TWA Limit

0.025 mg/m3

STEL

--

Ceiling Limit

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Notes & Notations
  • ACGIH A2 - Suspected human carcinogen (cancer causing)
  • IARC 1 - Carcinogenic to humans (cancer causing)
  • OHSR 5.57 is applicable for this designated substance
Basis of B.C. Exposure Limit
Minimize the potential for:
  • Lung cancer
  • Pulmonary fibrosis
  • Note: There may be other potential health effects; refer to ACGIH TLV Documentation and other relevant references.
Synonyms:

Silicon dioxide

IDLH:

Cristobalite, 25 mg/m3; Quartz, 50 mg/m3

 (Source: NIOSH)
If the substance you are searching has an entry that contains a size-selective fraction, form, or work activity, you should perform an additional search to confirm if other exposure limits may apply.

Ensure no workers are exposed to a substance that exceeds the exposure limits in accordance with OHSR 5.48.