| NO. | Item | Standard | Result |
|---|---|---|---|
| 1 | Characters | white powder | Complies |
| 2 | Assay | 99.9%min | 99.95% |
| 3 | Water solubility | clear | clear |
| 4 | Melting point | 132-135°C | 132.9-134.1°C |
| 5 | Residue on ignition | 0.02% max | 0.018% |
| 6 | Chloride | 0.001% max | Pass test |
| 7 | Sulphate | 0.005% max | Pass test |
| 8 | Heavy Metal | 5.0ppm max | Pass test |