Item

Standard

Result

Characters

White crystal or Crystalline Powder

Conform

Assay

99~100.5%

99.5%

Appearance of solution

Comply with the standard

Conform

Acidity or alkalinity

Comply with the standard

Conform

Bromides

≤0.1%

0.06%

Iodide

Comply with the standard

Conform

Sulphates

≤0.03%

0.01%

Aluminium

≤0.0001%

0.00008%

Barium

Comply with the standard

Conform

Iron

≤0.002%

0.001%

Magnesiumand 

alkaline-earth metals

≤0.02%

0.002%

Natrium

≤0.1%

0.05%

Heavy metal

≤0.001%

0.0007%

Loss on drying

≤1.0%

0.6%