Characteristics

White crystalline powder

Complies

Melting point

152.0-156°C

154°C

Specific rotation

-16 ~ -19°

-17.6°

PH

4.5~6.5

6.0

Chlorides

≤0.02%

<0.02%

Residue on ignition

≤0.1%

0.05%

Impurity

Individual impurities≤0.5%

Total impurities≤2%

0.45%

0.8%

Heavy Metal

≤20ppm

<20ppm

Fluorine content

≥4.8%

4.9%

Assay

≥98.0%

99.1%