NAME: 1,1-Dimethylhydrazine

SYNONYM(s): Unsymmetrical Dimethylhydrazine; UDMH

IMIS: 0940

CAS: 57-14-7

NIOSH: RTECS MV2450000; 40542

DOT: UN1163 Poison, Flammable Liquid, Corrosive

DESCRIPTION:

Fuming, colorless liquid with an amine-like odor.
MW: 60
BP: 146 F
VP: 103 mm
MP: -71 F

Exposure Limits

OSHA GENERAL INDUSTRY STANDARDS: 0.5 ppm, 1 mg/m3 (Skin)

OSHA CONSTRUCTION INDUSTRY STANDARDS: 0.5 ppm, 1 mg/m3 TWA (Skin)

THRESHOLD LIMIT VALUE: 0.01 ppm TWA (Skin); Appendix A3 (Confirmed Animal Carcinogen with Unknown Relevance to Humans)

RECOMMENDED EXPOSURE LIMIT: 0.06 ppm Ceiling (120 min), Potential Carcinogen

Health Factors

IARC: Group 2B, possibly carcinogenic to humans

SYMPTOM(s): Eye, skin irritation; choking, chest pain, dyspnea; lethargy; nausea; anoxia; convulsions; liver injury; (carcinogenic)

HEALTH EFFECTS: Mutagen (HE2); CNS effects (HE8); Anemia (HE12)

ORGAN: CNS, liver, gastrointestinal tract, blood, respiratory system, eyes, skin

Monitoring

SLC1:

MEDIA: Midget Fritted Glass Bubbler (MFGB) 15 mL 0.1N HCl
MAX V: 100 Liters   MAX F: 1.0 L/min
ANL 1: Colorimetric Analysis
REF: 1 (NIOSH S-143)
SAE: 0.10
CLASS: Fully Validated

SECONDARY SAMPLING/ANALYTICAL METHOD (SAM2):

DEVICE: Detector Tube COMPANY: MSA
PART #: 460425 RANGE: 0.5-50 ppm
CLASS: Mfg DEVICE: Instrumentation COMPANY: Foxboro
PART #: MIRAN 1A & 1B RANGE: 0.3 ppm @ 11.2 um
CLASS: Mfg