Methyl hydrazine
Synonyms & Trade Names
MMH, MonomethylhydrazineExposure Limits
NIOSH REL
Ca C 0.04 ppm (0.08 mg/m3) [2-hr] See Appendix AOSHA PEL
C 0.2 ppm (0.35 mg/m3) [skin]Physical Description
Fuming, colorless liquid with an ammonia-like odor.Molecular Weight
46.1Boiling Point
190°FFreezing Point
-62°FSolubility
MiscibleVapor Pressure
38 mmHgIonization Potential
8.00 eVSpecific Gravity
(77°F): 0.87Flash Point
17°FUpper Exposive Limit
92%Lower Explosive Limit
2.5%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Oxides of iron; copper; manganese; lead; copper alloys; porous materials such as earth, asbestos, wood & cloth; strong oxidizers such as fluorine & chlorine; nitric acid; hydrogen peroxideExposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contactSymptoms
irritation eyes, skin, respiratory system; vomiting, diarrhea, tremor, ataxia; anoxia, cyanosis; convulsions; [potential occupational carcinogen]Target Organs
Eyes, skin, respiratory system, central nervous system, liver, blood, cardiovascular systemCancer Site
[in animals: lung, liver, blood vessel & intestine tumors]Personal Protection/Sanitation
(See protection codes)Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet (flammable)
Change:No recommendation
Provide:Eyewash, Quick drench
First Aid
(See procedures)Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations
NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
Any appropriate escape-type, self-contained breathing apparatus
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division