Arsenic and inorganic compounds, as As

CAS Number


Last Revised


TWA Limit

0.01 mg/m3



Ceiling Limit


Notes & Notations
  • ACGIH A1 - Confirmed 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:
  • Adverse effects on skin, liver, peripheral vasculature, upper respiratory tract, and lungs
  • Lung cancer
  • Note: There may be other potential health effects; refer to ACGIH TLV Documentation and other relevant references.



5 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.