Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

White  crystalline powder

Specific rotation[α]20/D

+12.0 to +12.8°

12.3°

State of solution
(Transmittance)

Clear and colorless not less than 98.0%

98.0%

Chloride (Cl)

Not more than 0.020%

0.016%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

0.016%

Iron (Fe)

Not more than 10ppm

6ppm

Heavy metal(Pb)

Not more than 10ppm

8ppm

Arsenic(As2O3)

Not more than 1ppm

<1ppm

Loss on drying

Not more than 0.20%

0.18%

Residue on ignition(sulfated)

Not more than 0.10%

0.08%

Assay

98.0% to 100.5%

98.5%

pH

7.0 to 8.5

7.6

Inspector:

陈君 王明芳

Manager:

彭秀明

Conclusion

The product is according with standard.