|
Appearance
|
White crystalline powder
|
|
Assay (alkalimetric)
|
99.5 - 100.5%
|
|
Identity (IR)
|
Passes test
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Insoluble matter in water
|
Max 0.005%
|
|
Iron (Fe)
|
Max 0.0003%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Phosphate (PO4)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Arsenic (As)
|
Max 0.0001%
|
|
Mercury (Hg)
|
Max 0.0001%
|
|
Lead (Pb)
|
Max 0.0002%
|
|
Oxalate (as C2H2O4)
|
Passes test
|
|
Sulphated ash (at 600°C)
|
Max 0.05%
|
|
Substance carbonizable by hot H2SO4
|
Passes test
|
|
Water (by KF)
|
Max 0.5%
|