鑒別

meets the requirements

性狀

white crystals or
crystalline powder

比旋光度 [α]_D²⁰

+24.0°to +26.5°

溶液的透過率

clear and colorless
not less than 98.0%

氯化物

not more than 0.039%

銨鹽(NH₄)

not more than 0.02%

硫酸鹽 (SO₄)

not more than 0.030%

鐵鹽(Fe)

not more than 30ppm

重金屬 (Pb)

not more than 10ppm

砷鹽 (As₂O₃)

not more than 1ppm

其它氨基酸

chromatographically
not detectable

干燥失重

not more than 0.50%

灼燒殘渣

not more than 0.20%

含量

98.0% to 101.0%

PH

5.0 to 7.0