| Item | Standard | Result |
| Characters | white powder | Complies |
| Assay | 99.9%min | 99.95% |
| Water solubility | clear | clear |
| Melting point | 132-135deg.C | 132.9-134.1deg.C |
| Residue on ignition | 0.02% max | 0.018% |
| Chloride | 0.001% max | Pass test |
| Sulphate | 0.005% max | Pass test |
| Heavy Metal | 5.0ppm max | Pass test |