Title: Methylhydrazine
CAS Registry Number: 60-34-4
Additional Names: Monomethylhydrazine; MMH
Molecular Formula: CH6N2
Molecular Weight: 46.07
Percent Composition: C 26.07%, H 13.13%, N 60.81%
Line Formula: CH3NHNH2
Literature References: Early prepns: Beilstein 4, 546; 1st suppl., 560. Prepn of sulfate: Hatt, Org. Synth. coll. vol. I, 395 (1943); Audrieth, Diamond, J. Am. Chem. Soc. 76, 4869 (1954). Manuf and properties: Knight, Hydrocarbon Process. Petr. Refin. 41, 179 (1962). Toxicity and metabolism: Witkin, Arch. Ind. Health 13, 34 (1956); Dost et al., Biochem. Pharmacol. 15, 1325 (1966); Gregory et al., Clin. Toxicol. 4, 435 (1971); Magee et al. in Proc. Fifth Int. Congress Pharmacology, San Francisco, 1972 vol. 2, T. A. Loomis, Ed. (Karger, New York, 1973) pp 140-149.
Properties: Clear liquid, odor characteristic of short chain, organic amines. d25 0.874. mp -52.4°. bp 87.5°. Heat capacity (25°): 32.25 cal/mole/°C. Flammability limits in air (%-vol): 2.5 to 97 ± 2%. Miscible with water, hydrazine, low mol wt monohydric alcohols. Sol in hydrocarbons. Mildly alkaline base. Strong reducing agent. Ignites spontaneously on contact with strong oxidizing agents such as fluorine, chlorine trifluoride, nitrogen tetroxide, fuming nitric acid. LD50 orally in mice, rats: 33.0, 32.5 mg/kg (Witkin); orally in rats: 70.7 mg/kg (Gregory).
Melting point: mp -52.4°
Boiling point: bp 87.5°
Density: d25 0.874
Toxicity data: LD50 orally in mice, rats: 33.0, 32.5 mg/kg (Witkin); orally in rats: 70.7 mg/kg (Gregory)
Derivative Type: Sulfate
Molecular Formula: CH3NHNH2.H2SO4
Molecular Weight: 144.15
Percent Composition: C 8.33%, H 5.59%, N 19.43%, S 22.24%, O 44.40%
Properties: White plates from 80% ethanol. mp 141-142°.
Melting point: mp 141-142°
CAUTION: Potential symptoms of overexposure to methylhydrazine are irritation of eyes, skin and respiratory system; vomiting; diarrhea; tremors and ataxia; anoxia, cyanosis; convulsions. Potential occupational carcinogen. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 210.
Use: In rocket fuel; intermediate in chemical syntheses.

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