|
Appearance
|
A pale yellow crystalline powder
|
|
Assay
|
Min 98%
|
|
Insoluble matter
|
Max 0.003%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Arsenic (As)
|
Max 0.00004%
|
|
Calcium (Ca)
|
Max 0.002%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Magnesium (Mg)
|
Max 0.002%
|
|
Potassium (K)
|
Max 0.001%
|