|
Appearance
|
White to yellow powder or crystals
|
|
Assay
|
Min 95%
|
|
Substance insoluble in HNO3
|
Passes test
|
|
Chloride (Cl)
|
Max 0.03%
|
|
Iron (Fe)
|
Max 0.005%
|
|
Mercury (II) (as Hg)
|
Max 3.0%
|
|
Substance not reducible with formic acid (Residue on ignition as SO4)
|
Max 0.1%
|