|
Appearance
|
White crystalline powder
|
|
Assay (complexometric)
|
98 - 105%
|
|
Substance insoluble in HCl
|
Max 0.2%
|
|
Calcium hydrogen and tri-calcium phosphate
|
Passes test
|
|
Carbonate (as CO3)
|
Passes test
|
|
Chloride (Cl)
|
Max 0.125%
|
|
Fluoride (F)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.5%
|
|
Heavy metal (as Pb)
|
Max 0.003%
|
|
Arsenic (As)
|
Max 0.0001%
|
|
Barium (Ba)
|
Passes test
|
|
Iron (Fe)
|
Max 0.04%
|
|
Loss on ignition (at 800°C)
|
24.5 - 26.5%
|