Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

conforms

Specific rotation[α]20/D

-11.8 to -12.8°

-11.82°

State of solution
(Transmittance)

Not less than 95.0%

95.6%

Chloride (Cl)

Not more than 0.10%

<0.10%

Heavy metal(Pb)

Not more than 10ppm

<10ppm

Arsenic(As2O3)

Not more than 2ppm

<2ppm

Loss on drying

Not more than 0.20%

0.18%

Residue on ignition(sulfated)

Not more than 0.2%

0.08%

Assay

98.0 to101.0%

99.0%

Conclusion

The product conforms to the standard.

Remark:

Easy to moisture-absorbed; store in dry、dark、ventilated 、place.