|
Appearance
|
White to yellow to tan powder
|
|
Assay
|
Min 99.0%
|
|
Insoluble matter in NH4OH
|
Max 0.01% (passes ACS test)
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.01%
|
|
Phosphate (PO4)
|
Max 0.005%
|
|
Iron (Fe)
|
Max 0.003%
|
|
Carbonate (as CO3)
|
Max 0.3% (passes ACS test)
|