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　　Legal number: CAS RN) : 52-90-3 EINECS no. : 200-158-2

　　Molecular formula: C₃H₇NO₂S

　　Molecular weight: 121.16

　　Physical and chemical properties: twin monoclinic or orthogonal crystallization, melting point 178 ℃, (a) + 26.5 (mol/L HCL), imine tastes, in neutral or slightly alkaline solution easy oxidation by air into cystine, acidic environment is stable, soluble in water, ethanol, not soluble in ethanol, propanol, ethyl acetate, stupid, carbon disulfide, carbon tetrachloride.

　　USES: used in the treatment of skin conditions such as eczema, urticaria, freckles, the series products are widely used in medicine, food and cosmetics industries.

　　Standard: AJI92