|
Appearance
|
Colorless deliquescent crystals
|
|
Assay (alkalimetric)
|
Min 99.5%
|
|
Freezing point
|
Min 61°C
|
|
Insoluble matter in water
|
Max 0.003%
|
|
Sulphated ash
|
Max 0.5%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Nitrogen compounds (as N)
|
Max 0.003%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.0004%
|
|
Iron (Fe)
|
Max 0.0002%
|
|
Lead (Pb)
|
Max 0.0004%
|