|
Appearance
|
Greenish blue crystals/crystalline powder
|
|
Assay (oxidimetric)
|
99 - 101.5%
|
|
Insoluble matter
|
Max 0.01%
|
|
Phosphate (PO4)
|
Max 0.003%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.003%
|
|
Ferric ion (Fe+3)
|
Max 0.01%
|
|
Manganese (Mn)
|
Max 0.01%
|
|
Magnesium (Mg)
|
Max 0.002%
|
|
Potassium (K)
|
Max 0.002%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Substance not precipitated by NH4OH
|
Max 0.05%
|
|
Zinc (Zn)
|
Max 0.003%
|