Properties: Crystals. [a]D25 +6.5° (5N HCl); [a]D25 +13.0° (glacial acetic acid). pK1 1.71; pK2 8.33; pK3 10.78. Absorption spectrum: Abderhalden, Rossner, Z. Physiol. Chem.
178, 160 (1928). Freely sol in water, alcohol, acetic acid, ammonia water. Insol in ether, acetone, ethyl acetate, benzene, carbon disulfide, carbon tetrachloride. In neutral or slightly alkaline aq solns it is oxidized to cystine by air. More stable in acidic solns.
pKa: pK1 1.71; pK2 8.33; pK3 10.78
Optical Rotation: [a]D25 +6.5° (5N HCl); [a]D25 +13.0° (glacial acetic acid)
Derivative Type: Hydrochloride
CAS Registry Number: 52-89-1
Percent Composition: C 22.86%, H 5.12%, N 8.89%, O 20.30%, S 20.34%, Cl 22.49%
Properties: Crystals, dec 175-178°. [a]D25 +5.0° (5N HCl); [a]D25 +10.0° (glacial acetic acid). Sol in water, alcohol, acetone; the aq soln is acid. Keep tightly closed. Decomposes and oxidizes slowly; hygroscopic.
Optical Rotation: [a]D25 +5.0° (5N HCl); [a]D25 +10.0° (glacial acetic acid)
Use: As dough conditioner.
Therap-Cat-Vet: Has been used as a detoxicant.
产品链接: 52-90-4››