|
Appearance
|
White crystalline powder
|
|
Assay (acidimetric)
|
Min 99%
|
|
Insoluble matter in water
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.01%
|
|
Oxalate (as C2H2O4)
|
Max 0.035%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Lead (Pb)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Zinc (Zn)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0001%
|
|
Calcium (Ca)
|
Max 0.02%
|
|
Barium (Ba)
|
Max 0.002%
|
|
Reaction against H2SO4
|
Passes test
|
|
Water (H2O)
|
7.5 - 8.8%
|
|
Sulphated ash (at 600°C)
|
Max 0.05%
|