| ≥1 piece |
| Item | Specification |
| Purity (based on KOH) % | ≥ 99 |
| Potassium carbonate(K2CO3) % | ≤ 0.5 |
| Nitrate and Nitrite,(based on N) % | ≤ 0.005 |
| Chloride (based on Cl) % |
≤ 0.005 |
| Sulfate (based on SO4) % |
≤ 0.002 |
| Phosphorus (based on PO4) % | ≤ 0.002 |
| Fe (based on Fe) % | ≤ 0.0002 |
| Sodium (Na) % | ≤ 0.5 |
| Calcium (Ca) % | ≤ 0.002 |
| Aluminu (Al) % | ≤ 0.001 |
| Nickel (Ni) % | ≤ 0.0005 |
| Heavy Metal (based on Pb) % | ≤ 0.001 |