Structural Formula Vector Image
Title: 1,2-Dimethylhydrazine
CAS Registry Number: 540-73-8
Additional Names: N,N¢-Dimethylhydrazine; sym-dimethylhydrazine; SDMH
Molecular Formula: C2H8N2
Molecular Weight: 60.10
Percent Composition: C 39.97%, H 13.42%, N 46.61%
Line Formula: CH3NHNHCH3
Literature References: Prepn from dibenzoylhydrazine: Folpmers, Rec. Trav. Chim. 34, 34 (1915); Hatt, Org. Synth. coll. vol. II, 208 (1943). Electrosynthesis from nitromethane: Iversen, Ber. 104, 2195 (1971). Toxicity study: Witkin, Arch. Ind. Health 13, 34, (1956). Review of carcinogenic risk: IARC Monographs 4, 145-150 (1974); and of toxicology and human exposure: Toxicological Profile for Hydrazines (PB98-101025, 1997) 224 pp.
Properties: Flammable, hygroscopic, mobile liquid. Fumes in air and gradually turns yellow. Corrosive to skin! Characteristic ammoniacal odor of aliphatic hydrazines. d420 0.8274. bp753 81°. nD20 1.4209. Miscible with water with much evolution of heat. Also miscible with alcohol, ether, dimethylformamide, hydrocarbons. LD50 in mice, rats (mg/kg): 36, 160 orally; 29, 175 i.v. (Witkin).
Boiling point: bp753 81°
Index of refraction: nD20 1.4209
Density: d420 0.8274
Toxicity data: LD50 in mice, rats (mg/kg): 36, 160 orally; 29, 175 i.v. (Witkin)
Derivative Type: Dihydrochloride
Molecular Formula: C2H8N2.2HCl
Molecular Weight: 133.02
Percent Composition: C 18.06%, H 7.58%, N 21.06%, Cl 53.30%
Properties: Extremely hygroscopic prisms, dec 168°. Freely sol in water, ethanol.
CAUTION: For toxic symptoms see 1,1-Dimethylhydrazine.

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