CAS Number


Last Revised


TWA Limit




Ceiling Limit

1 ppm

Basis of B.C. Exposure Limit
Minimize the potential for:
  • Eye, skin, mucous membrane and respiratory irritation
  • Note: There may be other potential health effects; refer to ACGIH TLV Documentation and other relevant references.

45 ppm

 (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.