| Inspecting Items | Standard | Result |
| Appearance | white crystaline | white crystaline |
| PurityMin (%) | ≥94 | 95 |
| Carbonate (as Na2co3) (%) | ≤0.05 | 0.03 |
| lron Compound (FeO) (%) | ≤0.01 | 0.01 |
| Non-water soluble material(%) | ≤0.04 | 0.03 |
| PH (the pH of %1 solution at 20 degrees) | 8~10 | 9 |
