| Item | Standard |
| Content % | 99.0 min |
| Chloride % | 0.01 max |
| Iron (Fe) content % | 0.001 max |
| Heavy metal (Pb) % | 0.001 max |
| PH ( 1% water solution ) | 10.5-11.5 |
| Chelat e value (mg CaCo 3 /g) | 220 min |
| Sul ph ate % | 0.05 max |
| NTA % | 1.0 max |
| Appearance | White crystal powder |