|
Appearance
|
White crystalline powder
|
|
Assay
|
Min 99%
|
|
Insoluble matter
|
Max 0.003%
|
|
Reaction
|
pH 7.5 - 9.0
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Oxalate (as C2H2O4)
|
Max 0.01%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Ammonium (NH4)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0002%
|
|
Copper (Cu)
|
Max 0.005%
|
|
Iron (Fe)
|
Max 0.005%
|
|
Lead (Pb)
|
Max 0.001%
|
|
Sodium (Na)
|
Max 0.15%
|
|
Readily carbonisable substance
|
Passes test
|