|
Appearance
|
White crystalline powder
|
|
Assay (after ignition)
|
Min. 99.5%
|
|
Loss on drying (at 105°C)
|
Max. 1.0%
|
|
Sulphate (SO4)
|
Max. 0.02%
|
|
Ammonia (NH3)
|
Max. 0.002%
|
|
Iron (Fe)
|
Max. 0.002%
|
|
Lead (Pb)
|
Max. 0.002%
|
|
Potassium (K)
|
Max. 0.02%
|
|
pH (5% solution)
|
5.0 - 8.0
|