|
Appearance
|
Colorless crystals
|
|
Assay
|
98 - 102%
|
|
pH (5% solution in water)
|
6.0 - 8.0
|
|
Insoluble matter
|
Max 0.005%
|
|
Chloride (Cl)
|
Max 0.003%
|
|
Sulphate (SO4)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Calcium (Ca)
|
Max 0.02%
|
|
Potassium (K)
|
Max 0.05%
|