Title: Penicillamine Disulfide
CAS Registry Number: 312-10-7
CAS Name: 3,3¢-Dithiobisvaline
Additional Names: 3,3¢-dithiodivaline; 3,3,3¢,3¢-tetramethylcystine
Molecular Formula: C10H20N2O4S2
Molecular Weight: 296.41
Percent Composition: C 40.52%, H 6.80%, N 9.45%, O 21.59%, S 21.64%
Literature References: Prepn: Süs, Ann. 561, 31 (1948); Berg et al., GB 621915 (1949 to Merck & Co.); Butenandt et al., Z. Physiol. Chem. 285, 238 (1950).
Derivative Type: DL-Form
CAS Registry Number: 21174-80-1
Properties: Crystals, mp 181-183°.
Melting point: mp 181-183°
Derivative Type: D-Form
CAS Registry Number: 20902-45-8
Properties: Crystals, mp 204-205°. [a]D23 +27° (c = 1.46 in 1N HCl).
Melting point: mp 204-205°
Optical Rotation: [a]D23 +27° (c = 1.46 in 1N HCl)
Derivative Type: L-Form
CAS Registry Number: 113626-33-8
Properties: Crystals, mp 207°. [a]D22 -26° (1N HCl).
Melting point: mp 207°
Optical Rotation: [a]D22 -26° (1N HCl)
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