CMD - Carcinogens and Mutagens Directive, Annex III - OELVs

This list provides occupational exposure limit values (OELs) for carcinogens and mutagens pursuant to Annex III of of Directive 2004/37/EC (CMD). Employers are obligated to minimize worker exposure to these agents in so far as possible, and must arrange for medical surveillance of workers exposed to these substances.


EC / List no: 231-150-7 CAS no: 7440-41-7
Long-term Exposure Limit (LTEL) Values mg/m3
0.0002 mg/m3
Carcinogen Category
1B Category 1B, presumed to have carcinogenic potential for humans, classification is largely based on animal evidence.
Physical form
Inhalable Fraction
Dermal Sensitisation
Respiratory Sensitisation
Effective Date
11 July 2026

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