| ITEMS | STANDARD |
| Appearance | White Crystal Powders |
| Content % | 99.50% Min |
| Melting Point °C | 184-188 |
| Iron % | 0.002%Max |
| Chloride(Cl) % | 0.005%Max |
| Sulfate % | 0.02%Max |
| Easy oxide mg/L | 1.0Max |
| Heavy Metal % | 0.001%Max |
| Arsenic % | 0.0002%Max |
| Residue on ignition % | 0.025%Max |
| Moisture % | 0.5%Max |