Item

Standard

Actual Data

Description

White crystals or crystalline powder

Pass test

Content

≥98.5%

98.57

Specific Optical  Rotation[ɑ]D

+18.0°^_+21.5°

20.71˚

Loss on Drying

≤1.0%

0.52

Ammoniumate(as NH4)

≤0.04%

0.012

Heavy metal

≤0.003%

0.0006

As

≤0.0002%

0.00002

pH(1+10 water solution)

5.0～6.0

5.60

Residue on Ignition

≤0.3%

0.05%