Specification:
| Content (%) | ≥99 | 99.2 |
| Insolubles in hydrochloric acid (%) | ≤0.005 | Conform |
| Cl (%) | ≤0.005 | Conform |
| Fe (%) | ≤0.005 | Conform |
| Pb (%) | ≤0.02 | Conform |
| Alkali metals and alkaline earth metals (%) | ≤0.10 | Conform |
| Content (%) | ≥99 | 99.2 |
| Insolubles in hydrochloric acid (%) | ≤0.005 | Conform |
| Cl (%) | ≤0.005 | Conform |
| Fe (%) | ≤0.005 | Conform |
| Pb (%) | ≤0.02 | Conform |
| Alkali metals and alkaline earth metals (%) | ≤0.10 | Conform |