E-Limit

Hard metals, containing Cobalt and Tungsten Carbide, as Co, Thoracic

CAS Number

7440-48-4, 12070-12-1

Last Revised

2022

TWA Limit

0.005 mg/m3

STEL

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Ceiling Limit

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Notes & Notations
  • ACGIH A2 - Suspected human carcinogen (cancer causing)
  • ACGIH RSEN - Respiratory sensitizer
  • IARC 2A - Probably carcinogenic (cancer causing) to humans
  • OHSR 5.57 is applicable for this designated substance
Basis of B.C. Exposure Limit
Minimize the potential for:
  • Pneumonitis
  • hard metals disease
  • Note: There may be other potential health effects; refer to ACGIH TLV Documentation and other relevant references.
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.