|
Appearance
|
Pale violet crystals
|
|
Assay (iodometric)
|
98.5 - 102%
|
|
Insoluble matter
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Ferrous ion (Fe2+)
|
Passes test (about 0.001%)
|
|
Nitrate (NO3)
|
Max 0.01%
|
|
Calcium (Ca)
|
Max 0.01%
|
|
Magnesium (Mg)
|
Max 0.005%
|
|
Potassium (K)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Copper (Cu)
|
Max 0.003%
|
|
Zinc (Zn)
|
Max 0.003%
|
|
Substance not precepitated by NH3 (as SO4)
|
Max 0.05%
|