Appearance

White or pale yellow crystalline powder, hygroscopic

Conformed

Specific optical rotation

-22.0～-26.0°(C=1 H2O)

-25°

Loss on drying

≤1.0%

0.2%

Isomer

≤1.0%

0.009%

Residue on ignition

≤0.3%

0.1%

Assay(on dried basis)

98.0%～101.0%

100.2%