Item

Standard

Analysis data

Appearance

White crystal or crystalline powder

Conforms

Specific Rotation [20/D]
(C=2 in H2O)

-33.2º to  -35.2º 

-33.84º

Chloride (Cl)

Not more than0.020%

＜0.02%

Heavy metal(Pb)

Not more than 20ppm

＜10ppm

Lead

Not more than 10ppm

＜10ppm

Arsenic(As2O3)

Not more than 2 ppm

＜2ppm

Loss on drying 

Not more than 0.20%

0.18%

Residue on ignition (sulfated)

Not more than 0.10%

0.08%

Assay

98.5 to100.5%

99.21%

pH

5.4 to 6.0

5.78

Inspector:

庞强勇  刘玲

Manager: 

王钦芳

Conclusion

The product is according with standard.