|
Appearance
|
White deliquescent pellets or pearls
|
|
Assay (acidimetric)
|
Min 97%
|
|
Carbonate (as Na2CO3)
|
Max 1.0%
|
|
Chloride (Cl)
|
Max 0.01%
|
|
Sulphate (SO4)
|
Max 0.003%
|
|
Phosphate (PO4)
|
Max 0.002%
|
|
Silicate (SiO2)
|
Max 0.01%
|
|
Nitrogen compounds (as N)
|
Max 0.0005%
|
|
Heavy metal (as Pb)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0004%
|
|
Potassium (K)
|
Max 0.1%
|