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| Item | STANDARD |
| Loss on drying(%) | 11.5 - 12.5 |
| Residue on ignition(%) | 0.1 Max |
| Heavy Metals(ppm) | 10.0 Max |
| As(ppm) | 1.0 Max |
| Fe(ppm) | 10.0 Max |
| pH | 4.4 - 6.4 |
| State of solution(%) | 98.0 Min |
| Cl(%) | 0.02 Max |
| NH4(%) | 0.1 Max |
| SO4(%) | 0.02 Max |