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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: P211

Chemical Abstracts Service (CAS) Registry Number: 7440-06-4

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 mg/m3 TWA

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    maximum volume:     960 Liters
    minimum volume: 480 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: Atomic Absorption Spectrophotometry; AAS/GF
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated

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