Title: Cystamine
CAS Registry Number: 51-85-4
CAS Name: 2,2¢-Dithiobisethanamine
Additional Names: 2,2¢-dithiobis[ethylamine]; b,-diaminodiethyl disulfide; bis[b-aminoethyl]disulfide; decarboxycystine
Molecular Formula: C4H12N2S2
Molecular Weight: 152.28
Percent Composition: C 31.55%, H 7.94%, N 18.40%, S 42.11%
Line Formula: (H2NCH2CH2)2S2
Literature References: Forms when cystine is distilled: Neuberg, Ascher, Chem. Zentralbl. 1907, II, 1156. Prepd by H2O2 oxidation of H2NCH2CH2SH: Mills, Jr., Bogert, J. Am. Chem. Soc. 62, 1173 (1940); Barnett, J. Chem. Soc. 1944, 5.
Properties: Viscous oil. Cannot be distilled without decompn (even in high vacuum). Freely sol in water. Sol in alc.
Derivative Type: Dihydrochloride
Molecular Formula: C4H12N2S2.2HCl
Molecular Weight: 225.20
Percent Composition: C 21.33%, H 6.27%, N 12.44%, S 28.48%, Cl 31.49%
Properties: Needles from methanol, dec 203-214°. Sol in water.

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