SPECIFICATION
| Appearance | A white or almost white, crystalline powder or colorless crystals |
| Assay | 98.5-101.5% |
| Melting Range | 128~131℃ |
| Loss on drying | ≤0.5% |
| Residue on ignition | ≤0.1% |
| Heavy metals | ≤0.003% |
| Readily carbonizable substances | Test as USP38 |
| Residual solvent | Test as USP38 |
| Organic Volatile impurities | Test as USP38 |
MOLECULAR STRUCTURE：
Molecular Formula: C6H6N2O
