M
|
VALUE
|
Appearance
|
White crystal powder
|
Assay
|
≥99%
|
Heavy metals
|
≤20ppm
|
Lead
|
≤10ppm
|
Fe
|
≤10ppm
|
Chloride
|
≤0.01%
|
Chelating agent
|
339min
|
Sulphate
|
≤0.05%
|
PH (5% solution)
|
2.8-3.0
|
Reducing substances
|
≤0.5%
|
Loss on drying (105±2ºC)
|
≤0.2%
|