|
Description
|
Colourless crystals or a white, crystalline powder
|
|
Identifications
|
-
|
|
Identification 'A'
|
Passes test
|
|
Identification 'B'
|
Passes test
|
|
Appearance of solution
|
Solution should be clear and colorless
|
|
Acidity or alkalinity
|
Not more than 0.2 ml of either 0.01M hydrochloric acid or 0.01 M sodium hydroxide is required to change the colour of the solution
|
|
Arsenic
|
NMT 2 ppm
|
|
Heavy metals
|
NMT 10 ppm
|
|
Iron
|
NMT 200 ppm
|
|
Chlorides
|
NMT 300 ppm
|
|
Loss on drying
|
48.0 to 52.0%
|
|
Assay (on dried basis)
|
99.0% to 100.5%
|