Appearance

White flake crystal,there are rose fragrance

Complies

Identification

Melting point: 148-152°C

USP-741

148-150°C

IR              

USP-197k

Complies

TLC

Complies

A characteristic reaction of chloride

Complies

Appearance of solution

No darker than BY4  

Complies

Specific rotation

-0.10°-+0.10°

0°

Related substances

≤0.50%            

0.17%

Heavy metals

≤20 ppm               USP231

10 PPM

Loss on drying

≤0.5%                  USP731

0.02%

Residue on ignition

≤0.1%                USP 281

0.02%

Assay (HPLC)

98%-102%

99.8%

Conclusion

The product complies with USP32