性状

white crystals or crystalline powder

鉴别

infrared absorption spectrum

比旋光度 [α]_D²⁰

+14.9 to +16.0°

溶液的透过率

clear and colorless
not less than 98.0%

氯化物

not more than 0.020%

铵盐 (NH₄)

not more than 0.02%

硫酸盐 (SO₄)

not more than 0.020%

铁盐 (Fe)

not more than 10ppm

重金属 (Pb)

not more than 10ppm

砷盐 (As₂O₃)

not more than 1ppm

其它氨基酸

conforms

干燥失重

not more than 0.20%

灼烧残渣

not more than 0.10%

含量

99.0 to 100.5%

PH

5.5 to 6.5

热原

nonpyrogenic