Chemical Sampling Information
Methyl hydrazine
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General Description
Synonyms: MMH; Monomethyl hydrazine
OSHA IMIS Code Number: 1794
IMIS Name History: Monomethyl Hydrazine prior to 5/23/08
Chemical Abstracts Service (CAS) Registry Number: 60-34-4
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: MV5600000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1244 131 [27 KB, PDF ]
NIOSH Pocket Guide to Chemical Hazards, Methyl hydrazine : chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-1 Table -- 0.2 ppm, 0.35 mg/m3 Ceiling; Skin
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 0.2 ppm, 0.35 mg/m3 Ceiling; Skin
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 0.2 ppm, 0.35 mg/m3 Ceiling; Skin
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.01 ppm, 0.02 mg/m3 Ceiling; Skin; Appendix A3 - Confirmed Animal Carcinogen with Unknown Relevance to Humans
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.04 ppm, 0.08 mg/m3 Ceiling (2 hours); Appendix A - NIOSH Potential Occupational Carcinogens
Health Factors
NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 20 ppm
Potential symptoms: Eye, respiratory system irritation; vomiting, diarrhea; tremors, ataxia; anoxia, cyanosis; convulsions, (carcinogenic)
Health Effects: Acute Lung, CNS and Blood damage (HE4) Mutagen/Suspect carcinogen (HE2); Suspect teratogen (HE5)
Affected organs: CNS, respiratory system, liver, blood, CVS, eyes
Literature Basis:
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
sampling media: Sulfuric Acid coated Gas Chrom R Tube (30/60 mesh)
minimum time: 15 Minutes maximum flow rate: 1.0 L/min (Ceiling)
current analytical method: High Performance Liquid Chromatography; HPLC/UV
method reference: OSHA Analytical Method (OSHA 20 )
method classification: Not Validated
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