|
Appearance
|
Colorless to white crystals or crystalline powder
|
|
Assay (on dried basis)
|
99.7 to 100.5 % (by titration with HCl)
|
|
Insoluble matter
|
=<0.01%
|
|
Chloride (Cl)
|
=<0.001 %
|
|
Phosphate (PO4)
|
=<0.0005%
|
|
Sulphur compounds (as SO4)
|
=<0.003 %
|
|
Ammonium (NH4)
|
=<0.0005%
|
|
Heavy metals (as Pb)
|
=<0.0005%
|
|
Iron (Fe)
|
=<0.0005%
|
|
Calcium (Ca)
|
=<0.002%
|
|
Magnesium (Mg)
|
=<0.001 %
|
|
Sodium (Na)
|
=<0.03 %
|