|
Appearance
|
Reddish brown flakes
|
|
Assay (iodometric)
|
Min 99%
|
|
Insoluble matter in water
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.02%
|
|
Total nitrogen (N)
|
Max 0.005%
|
|
Lead (Pb)
|
Max 0.004%
|
|
Iron (Fe)
|
Max 0.01%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Sodium (Na)
|
Max 0.01%
|
|
Potassium (K)
|
Max 0.005%
|
|
Substance precipitated by NH3
|
Max 0.02%
|