羧 甲 司 坦 638-23-3 S-(羧甲基)-L-半胱氨酸

S-(羧甲基)-L-半胱氨酸

羧 甲 司 坦

638-23-3

S-Carboxymethyl-L-Cysteine

外观 Description： 白色结晶或结晶性粉末 White crystals or crystalline powder

比旋光度 Specific optical rotation[a]D20°： -32.50°～ -35.50°

溶液状态 State of solution： Clear and colorless

干燥失重 Loss on drying： ≤0.50%

硫酸灰分 Sulphoated ash：≤0.30%

氯化物 Chloride： ≤0.15%

硫酸盐 Sulfate (SO4)： ≤300ppm

pH： 2.8~3.0

茚三酮正物质含量 Nihydrin-positive substances：Not more intense than the spot with reference solution (0.5%)

含量 Assay： 98.5%~101.0%