|
Appearance
|
White to off-white crystalline powder or crystals
|
|
Assay
|
Min 98.5%
|
|
Solution in dilute nitric acid
|
Passes test
|
|
Residue after reduction
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Sulphate (SO4)
|
Max 0.002%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Potassium (K)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.005%
|