|
Appearance
|
White crystalline powder
|
|
Assay
|
Min 99.5%
|
|
Melting point
|
185 - 190 deg C
|
|
Insoluble matter
|
Max 0.003%
|
|
Sulphated ash
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.002%
|
|
Ammonium (NH4)
|
Max 0.001%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Substance reducing KMnO4 (as O)
|
Max 0.008%
|