|
Appearance
|
White crystalline powder
|
|
Assay (acidimetric)
|
Min 99.5%
|
|
pH (5% solution in water)
|
8.8 - 9.4
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Total nitrogen (N)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Potassium (K)
|
Max 0.005%
|