性狀

white crystals or crystalline powder

鑒別

infrared absorption spectrum

比旋光度 [α]_D²⁰

+14.9 to +16.0°

溶液的透過率

clear and colorless
not less than 98.0%

氯化物

not more than 0.020%

銨鹽 (NH₄)

not more than 0.02%

硫酸鹽 (SO₄)

not more than 0.020%

鐵鹽 (Fe)

not more than 10ppm

重金屬 (Pb)

not more than 10ppm

砷鹽 (As₂O₃)

not more than 1ppm

其它氨基酸

conforms

干燥失重

not more than 0.20%

灼燒殘渣

not more than 0.10%

含量

99.0 to 100.5%

PH

5.5 to 6.5

熱原

nonpyrogenic