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Ribavirin
| ITEMS | LIMIT |
| 1) Description | a white crystalline powder, odorless, free of visible contamination |
| 2) Identification | IR spectrum conforms to reference standard |
| 3) Specific rotation | -33.0 ~ -37.0o (dried basis at 20oC) |
| 4) Loss on drying | ≤0.5% |
| 5) PH | 4.0 ~ 6.5 |
| 6) Sulphated ash | ≤0.1% |
| 7) Heavy metals | ≤0.001% |
| 8) Related substances | |
| a) Impurity F | ≤0.1% |
| b) Any other impurity | ≤0.1% |
| c) Total impurities | ≤0.2% |
| 9) Disregard limit | 0.05% |
| 10) Assay (dried basis) | 98.0% ~ 102.0% |
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