|
Appearance
|
White crystals or crystalline powder
|
|
Assay (complexometric)
|
98.5-102%
|
|
Insoluble matter
|
Max 0.005%
|
|
Reaction
|
Min pH 2.0
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Ammonium (NH4)
|
Max 0.02%
|
|
Copper (Cu)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.002%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Magnesium (Mg)
|
Max 0.001
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Potassium (K)
|
Max 0.002%
|
|
Sodium (Na)
|
Max 0.005%
|