|
Appearance
|
A soft white crystalline powder
|
|
Assay
|
99.7 - 100.5%
|
|
Identity
|
Passes test
|
|
Insoluble matter
|
Max 0.015%
|
|
Carbonate
|
Passes test
|
|
pH
|
Max 8.6
|
|
Chloride (Cl)
|
Max 0.003%
|
|
Nitrogen compounds (as N)
|
Max 0.001%
|
|
Phosphate (PO4)
|
Max 0.005%
|
|
Silicate (SiO2)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.003%
|
|
Ammonium (NH4)
|
Max 0.0005%
|
|
Arsenic (As)
|
Max 0.0002%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Magnesium (Mg)
|
Max 0.005%
|
|
Potassium (K)
|
Max 0.005%
|
|
Substance reducing iodine (I)
|
Max 0.0065%
|
|
Loss on drying (over silica gel; 4 hrs)
|
Max 0.25%
|