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Chemical Sampling Information (CSI)
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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 of Chemical Substances (RTECS) Identification Number: MV5600000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1244 131

NIOSH Pocket Guide to Chemical Hazards, Methyl hydrazine: chemical description, physical properties, potentially hazardous incompatibilities, and more

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 29 CFR 1910.1000 Z-1 Table -- 0.2 ppm, 0.35 mg/m3 Ceiling; Skin

Construction Industry: 29 CFR 1926.55 Appendix A -- 0.2 ppm, 0.35 mg/m3 Ceiling; Skin

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

Primary Laboratory Sampling/Analytical Method (SLC1):

  • 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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