|
Appearance
|
White crystalline powder.
|
|
Assay
|
99.5 - 101%
|
|
pH (5% solution in water)
|
7.5 - 9.2
|
|
Insoluble matter
|
Max 0.005%
|
|
Chloride (Cl)
|
Max 0.003%
|
|
Nitrogen compounds (as N)
|
Max 0.001%
|
|
Phosphate (PO4)
|
Max 0.0005%
|
|
Sulphate (SO4)
|
Max 0.002%
|
|
Calcium (Ca)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Magnesium (Mg)
|
Max 0.002%
|
|
Potassium (K)
|
Max 0.005%
|
|
Substance reducing KMnO4 (as O)
|
Passes test
|