Appearance

White crystalline powder

Identification(Infrared absorption)

Corresponding to the reference spectrum

Specific rotation

-9.8°~ -11.2°

Assay

98.5%-101.5%

Loss on drying

≤0.30%

Residue on ignition

≤0.40%

Heavy metals(Pb)

≤15ppm

Iron(Fe)

≤30ppm

Sulphate(SO4)

≤0.04%

Chloride(Cl)

≤0.04%