|
Appearance
|
White crystalline powder
|
|
Assay
|
Min 99%
|
|
Substance insoluble in dilute acetic acid
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Nitrate (NO3)
|
Max 0.005%
|
|
Foreign heavy metals (as Pb)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Mercury (I) (as Hg)
|
Max 0.3%
|
|
Substance not reducible with formic acid (Residue on ignition as SO4)
|
Max 0.02%
|