Favipiravir Impurity 13 CAS CATO-C4X-210213
| CAS No. | CATO-C4X-210213 |
| Molecular Formula | C5HClN4O2 |
| Molecular Weight | 184.54 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Favipiravir Impurity 13 (CAS CATO-C4X-210213) is a certified pharmaceutical impurity reference standard with the molecular formula C5HClN4O2 and a molecular weight of 184.54 g/mol.
Favipiravir Impurity 13 (C5HClN4O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 13 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 | C5HClN4O2 |
| Molecular Weight | 184.54 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Favipiravir Standards
- Favipiravir Impurity 18 (CAS 259793-97-0)
- Favipiravir Impurity 16 (CAS 1023813-21-9)
- Favipiravir Impurity 5 (CAS 356783-16-9)
- Favipiravir Impurity 2 (CAS 259793-90-3)
- Favipiravir Impurity 1 (CAS CATO-C4X-21021)
- Favipiravir Impurity 23 (CAS 2091074-00-7)
- Favipiravir Impurity 23 (CAS 356783-14-7)
- Favipiravir-13C3 (CAS CATO-C4X-210210)
Recommended Standards
- 1-Chloro-2,3,4,6-tetrafluorobenzene (CAS 5172-06-5)
- 3-(Chloromethyl)-5-(trifluoromethyl)-1H-pyrazole (CAS 1462379-36-7)
- 1-Chloro-2,3,4,5-tetrafluorobenzene (CAS 769-37-9)
- 3-Chloro-1-methyl-5-(trifluoromethyl)-1h-pyrazole (CAS 161038-55-7)
- Leuprorelin impurity 34 TFA (CAS CATO-C4X-182234)
- (R)-Cetirizine EP Impurity G DiHCl (CAS 728948-88-7)
- Tedizolid Impurity 27 (CAS CATO-C4X-105427)
- 1-(2-Phenylacetamido)cyclopropane-1-carboxylic acid (CAS 1840325-02-1)
- 2-(4-Nitrobenzyl)thiophene (CAS 172508-14-4)
- p-terphenyl-4,4′′-dithiol (CAS 174706-21-9)
- 5-(4-Chlorophenyl)-4h-1,2,4-triazol-3-amine nitrate (CAS 1417568-97-8)
- 5,6-dimethyl-6-(2-oxanyl)-1-cyclohexa-1,3-dienamine 5,6-dimethyl-6-(oxan-2-yl)cyclohexa-1,3-dien-1-amine 6723-30-4 A835675 (CAS 6723-30-4)
- 3-Iodo-1-methyl-1H-pyrazolo[3,4-c]pyridine-4-carbaldehyde (CAS 2920715-03-1)
- Semaglutide impurity 72 (CAS CATO-C4X-222672)
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