| MOQ | Kg |
| Component | Range | Typical |
| N content(dry base) % | 21.0 min | 21.04 |
| Water (H2O) % | 0.2 max | 0.16 |
| Free acid(H2SO4)content % | 0.03 min | 0.02 |
| Ferric(Fe) | 0.007% max | 0.002% max |
| Heavy metal (Pb) | 0.005%max | 0.003% |
| As | 0.007% max | 0.002% |
| Insoluble | 0.01%max | 0.01% |
| Appearance | white crystaler | Confirm |
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