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Item | Standard | Test method | Results |
Assay % | 98.5-101.5 | HPLC | 99.7 |
Identification A | Conform | IR | Conform |
Identification B (Ratio:A245/A262) | 0.63-0.67 | UV | 0.67 |
Melting range,°C | 128-131 | Melting point apparatus | 129.3-129.9 |
Loss on drying ,% | ≤0.5 | Silicagel drier | 0.04 |
Residue on ignition,% | ≤0.1 | High temperature ignition | 0.03 |
Heavy metals, % | ≤0.003 | Colorimetry | <0.003 |
Readily carbonizable substances | Conform | Colorimetry | Conform |