| Item | Specification | Results |
| Appearance | White sheet crystals | Pass |
| Assay | ≥98.0% | 98.25% |
| Melting point | 92~96℃ | 94.6-95.4 |
| Loss on drying | ≤0.5％ | 0.11% |
| Ignition residue | ≤0.5％ | 0.06% |
| Color reaction of ferric chloride | Negative | Negative |
| Heavy metal | ≤10 ppm | Pass |
| Arsenic | ≤2 ppm | Pass |
| Pathogen | Bacteria: ≤300cfu/g Fungus: ≤100cfu/g | <100 <50 |
| Conclusion | Pass | |
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