Item

Standard

Analysis data

Appearance

White crystal or crystalline powder

Conforms

Specific Rotation [20/D]
(C=2 in H2O)

-33.2º to  -35.2º 

-34.4º

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%

0.15%

Residue on ignition (sulfated)

Not more than 0.10%

0.08%

Assay

98.5 to100.5%

99.4%

Conclusion

The product is according with standard.