|
Appearance
|
Red to very dark red and red-brown and brown-red crystals
|
|
Assay (complexometric)
|
98.0-102.0%
|
|
Insoluble matter
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Ammonium (NH4)
|
Max 0.2%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Lead (Pb)
|
Max 0.002%
|
|
Magnesium (Mg)
|
Max 0.005%
|
|
Nickel (Ni)
|
Max 0.15%
|
|
Potassium (K)
|
Max 0.01%
|
|
Sodium (Na)
|
Max 0.05%
|
|
Zinc (Zn)
|
Max 0.01%
|