Favipiravir Impurity 11 CAS 6863-74-7
| CAS No. | 6863-74-7 |
| Molecular Formula | C5H2ClN3 |
| Molecular Weight | 139.54 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Favipiravir Impurity 11 is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Favipiravir Impurity 11 (CAS 6863-74-7) is a certified pharmaceutical impurity reference standard with the molecular formula C5H2ClN3 and a molecular weight of 139.54 g/mol.
Structurally, Favipiravir Impurity 11 (C5H2ClN3) contains a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 139.54 g/mol, it falls into the low-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Favipiravir Impurity 11 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H2ClN3 |
| Molecular Weight | 139.54 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Favipiravir Standards
- Favipiravir Impurity 14 (CAS 55557-52-3)
- Favipiravir Desfluoro Impurity (CAS 55321-99-8)
- Favipiravir Impurity 17 (CAS 1137606-76-8)
- Favipiravir Impurity 7 (CAS 356783-31-8)
- Favipiravir Impurity 6 (CAS 356783-28-3)
- Favipiravir Deoxy Impurity (CAS 356783-47-6)
- Favipiravir Impurity 28 (CAS 36070-86-7)
- Favipiravir Impurity 43 (CAS 859064-07-6)
Recommended Standards
- 6-Chloropyrimidine-4-carbonitrile (CAS 939986-65-9)
- 6-Chloropyridazine-3-carbonitrile (CAS 35857-89-7)
- Celecoxib Impurity 17 (CAS 75877-78-0)
- 5-Chloropyrimidine-2-carbonitrile (CAS 38275-56-8)
- Estazolam Impurity 8 (CAS CATO-C4X-19228)
- CAS 1333112-32-5 (CAS 1333112-32-5)
- Trazodone Impurity 85 (CAS CATO-C4X-177285)
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- 1-{2-amino-4H,5H,7H-thieno[2,3-c]pyran-3-yl}ethan-1-one (CAS 1467507-64-7)
- 2-((tert-Butoxycarbonyl)amino)-3-(3,5-difluorophenyl)propanoic acid (CAS 669057-06-1)
- 2-(Carboxy(hydroxy)methyl)-7-hydroxybenzo[d]oxazole (CAS 1807042-04-1)
- Methyl 4-(4-heptylphenyl)-2-methyl-5-oxo-4,5-dihydro-1H-indeno[1,2-b]pyridine-3-carboxylate (CAS 439110-72-2)
- Methyl phthalazine-1-carboxylate (CAS 1241675-22-8)
- MCH-Gene-Overprinted-Polypeptide-14 (rat) (H-4746.0500) (CAS 182917-44-8)
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