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| ITEMS | STANDARDS | ||
| Assay, % | 98.5-101.5 | ||
| Characteristics | White crystalline powder | ||
| Identification | Complies | ||
| Melting range, ℃ | 128-131 | ||
| Loss on drying ,% | ≤0.5 | ||
| Residue on ignition,% | ≤0.1 | ||
| Heavy metals,% | ≤0.003 |
