|
Appearance
|
White crystalline powder
|
|
Assay
|
99.5 - 100.5%
|
|
pH (2% solution in water)
|
5.5 - 8.5
|
|
Insoluble matter in water
|
Max 0.01%
|
|
Bromide (Br)
|
Max 0.01%
|
|
Iodide (I)
|
Max 0.002%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Phosphate (PO4)
|
Max 0.005%
|
|
Total nitrogen (N)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0003%
|
|
Calcium (Ca)
|
Max 0.002%
|
|
Barium (Ba)
|
Max 0.001%
|
|
Magnesium (Mg)
|
Max 0.001%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Loss on drying (at 105°C)
|
Max 1.0%
|