| Description | Unit | Specification* | Typical Analysis | Reference method |
| Total Contents | Wt-% | 99 | 99.5 | |
| Total Nitrogen(N) | Wt-% | 13 | 13.83 | AOAC 2.4.02 |
| Nitrate Nitrogen(NO3) | Wt-% | 13.57 | ||
| Ammoniacal Nitrogen(N-NH4 ) | Wt-% | 0.26 | ||
| Potassium （K2O） | Wt-% | 45 | 46.58 | AOAC 2.5.07 |
| Moisture(H2O) | Wt-% | <0.4 | 0.16 | |
| Water Insoluble | Wt-% | <0.20 | 0.1 | |
| pH (0.4%) | 6 | 6.2 | ||
| Solubility in water@ 20 ºC | g/dm3 | 400 | ||
| Chloride (Cl) | Wt-% | <1.5 | 0.29 | |
| Sodium ( Na) | Wt-% | <1.5 | 0.08 | |
| Heavy metals | ||||
| As | ppm | 0.1 | EPA 6010C | |
| Co | ppm | 0.5 | EPA 6010C | |
| Cd | ppm | 0.1 | EPA 6010C | |
| Ni | ppm | 0.25 | EPA 6010C | |
| Pb | ppm | 3.96 | EPA 6010C | |
| Hg | ppm | 0.013 | SW 7471A |
| Analysis Item | Specification | Result of Analysis |
| Assay | ≥99.4% | 99.52% |
| Moisture | ≤0.15% | 0.065% |
| Water Insoluble | ≤0.03% | 0.013% |
| Chloride (as Cl) | ≤0.02% | 0.016% |
| Sulphate (as SO4) | ≤0.01% | 0.006% |
| Carbonate(as CO3) | ≤0.01% | 0.0076% |
| Hygroscopicity | ≤0.25% | 0.16% |
