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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: 1368

Chemical Abstracts Service (CAS) Registry Number: 7440-58-6

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: MG4600000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1326 32; 2545 40

Chemical Description and Physical Properties:

solid. Appearance and odor vary depending upon specific compounds

Incompatibilities: Strong oxidizers and chlorine

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.5 mg/m3 TWA

Construction Industry: 0.5 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.5 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.5 mg/m3 TWA

Health Factors

Potential Symptoms: In animals: eye, skin, mucous membrane irritation; liver damage

Health Effects: Cumulative liver damage (HE3) Irritation-Eyes, Throat, Skin---Mild (HE16)

Affected Organs: Eyes, skin, mucous membranes

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 Spectroscopy; AAS
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated

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