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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: 2163

Chemical Abstracts Service (CAS) Registry Number: 57-57-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: RQ7350000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1848 29

Chemical Description and Physical Properties:

colorless liquid with a slightly sweetish odor
molecular weight: 72
vapor pressure: 3.4 at 25°C
boiling point: Decomposes at -323°F
melting point: -28°F

Incompatibilities: Acetates, halogens, thiocyanates, and thiosulphates

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: Cancer-Suspect Agent 29 CFR 1910.1013

Construction Industry: Carcinogen - See Threshold Limit Value pamphlet, Appendix A (Note 5)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.5 ppm; 1.5 mg/m3 TWA; Appendix A3 (Confirmed Animal Carcinogen with Unknown Relevance to Humans)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Potential Carcinogen, Use 29 CFR 1910.1013

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 2B, possibly carcinogenic to humans

National Toxicology Program (NTP): Suspect Human Carcinogen

Potential Symptoms: Skin irritation, blistering, burns; corneal opacity; frequent urination; dyspnea; hematuria; (carcinogenic)

Health Effects: Cancer (HE1)

Affected Organs: Kidneys, skin, lungs, eyes

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