AnhydrousProperty: colorless or white crystalline powder. deliquescent in humid air and efflorescent in dry air.
MonohydrateProperty: colourless crystals or white crystalline granules (technical grade with light yellow colour), odorless, taste intensely tart flavour, readily soluble in water and ethanol.
Item |
Anhydrous |
Monohydrate |
According to |
BP98/BP2011/BP2014 |
BP98/BP2011/BP2014 |
Solubility |
Conforming with test |
Conforming with test |
clarity and color of solution |
20% water solution clarity |
20% water solutionclarity |
Assay |
99.5%-101% |
99.5%-101% |
Water |
0.5% Max |
7.5%-9% |
Sulfate |
150ppm Max |
150ppm Max |
Readily carbonisable substances |
Standard colour |
Standard colour |
Barium |
Conforming with test |
Conforming with test |
Calcium |
200ppm Max |
200ppm Max |
Heavy metals |
5ppm Max |
5ppm Max |
Lead(PB) |
0.5ppm Max |
0.5ppm Max |
Iron |
50ppm Max |
50ppm Max |
Chloride |
50ppm Max |
50ppm Max |
Oxalate |
100ppm Max |
100ppm Max |
Sulfated ash |
0.05% Max |
0.05% Max |
Tridodecylamine |
0.1ppm Max |
0.1ppm Max |
Arsenic |
1ppm Max |
1ppm Max |
Arganic volatile impurities |
Conforming with test |
Conforming with test |
Bacterial endotoxins |
0.5 I.U./mg Max |
0.5 I.U./mg Max |
Mercury |
1ppm Max |
1ppm Max |
Aluminum |
0.2ppm Max |
0.2ppm Max |