Favipiravir Impurity 21 CAS CATO-C4X-210221
| CAS No. | CATO-C4X-210221 |
| Molecular Formula | C10H7FN6O4 |
| Molecular Weight | 294.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
As a process- or degradation-related impurity, Favipiravir Impurity 21 (CAS CATO-C4X-210221, C10H7FN6O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Favipiravir Impurity 21 (C10H7FN6O4) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C10H7FN6O4 |
| Molecular Weight | 294.20 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 6 |
Related Favipiravir Standards
- Favipiravir Impurity 4 (CAS 259794-06-4)
- Favipiravir Impurity 24 (CAS 6966-01-4)
- Favipiravir Impurity 24 (CAS CATO-C4X-210224)
- Favipiravir Impurity 23 (CAS 440124-25-4)
- Favipiravir Impurity 19 (CAS 1257072-34-6)
- Favipiravir Impurity 3 (CAS 259793-88-9)
- Favipiravir Impurity 17 (CAS 6329-74-4)
- Favipiravir Impurity 23 (CAS 356783-14-7)
Recommended Standards
- 5-(2,3,4,5,6-Pentafluorophenyl)-2-thiophene carboxylic acid (CAS 893737-99-0)
- 2-(2-((1-(5-Bromothiophen-2-yl)ethyl)amino)ethoxy)ethan-1-ol (CAS 1179297-65-4)
- 4,4,5,5-Tetramethyl-2-(4-methyl-[1,1'-biphenyl]-3-yl)-1,3,2-dioxaborolane (CAS 2253981-35-8)
- 1-((3-Bromothiophen-2-yl)methyl)indoline (CAS 1223214-33-2)
- Nintedanib Impurity 156 (CAS 1040320-04-4)
- Baclofen impurity 32 (CAS CATO-C4X-101232)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
- 3,4-Dibromo-2,6-difluorophenylacetic acid (CAS 1804414-38-7)
- (N4-Benzoyl)-5-O-[(N,N-diisopropylamino)-(2-cyanoethoxy)phosphinyl]-3-O-(4,4-dimethoxytrityl)-2-deoxycytidine (CAS 140712-83-0)
- Ethyl 6-bromo-3-fluoropicolinate (CAS 1214332-73-6)
- 2-Amino-5-cyclopropoxyisonicotinonitrile (CAS 1243323-20-7)
- Methyl 1-(pyridin-3-yl)piperidine-2-carboxylate (CAS 1822471-25-9)
- Ginsenoside F4 (CAS 181225-33-2)
- Bonemarrow-Derived Mesenchymal Stem Cells Affinity Peptide trifluoroacetate salt (CAS 683750-83-6)
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