|
Appearance
|
White crystalline powder
|
|
Assay (alkalimetric)
|
Min 99.0%
|
|
Substance insoluble in Na2CO3 solution
|
Max 0.05%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Nitrate (NO3)
|
Max 0.005%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Water
|
Max 0.5%
|
|
Sulphated ash
|
Max 0.02%
|