|
Appearance
|
White crystalline powder
|
|
Assay
|
Min 99%
|
|
pH (5% solution in water)
|
7.5 - 9.0
|
|
Insoluble matter
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Phosphate (PO4)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.003%
|
|
Aluminium (Al)
|
Max 0.001%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Heavy metals (by ICP-OES)
|
Max 0.001%
|
|
Magnesium (Mg)
|
Max 0.002%
|
|
Potassium (K)
|
Max 0.05%
|
|
Loss on drying
|
Max 1.0%
|