Favipiravir Impurity 1 CAS CATO-C4X-21021
| CAS No. | CATO-C4X-21021 |
| Molecular Formula | C5H4FN3O3 |
| Molecular Weight | 173.10 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Favipiravir Impurity 1 (CAS CATO-C4X-21021), a pharmacopoeial impurity reference standard (molecular formula C5H4FN3O3, MW 173.10 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, Favipiravir Impurity 1 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 173.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), Favipiravir Impurity 1 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 | C5H4FN3O3 |
| Molecular Weight | 173.10 g/mol |
| Appearance | Off-white to pale 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, water |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Favipiravir Standards
- Favipiravir Impurity 23 (CAS 2091074-00-7)
- Favipiravir Impurity 2 (CAS 259793-90-3)
- Favipiravir Impurity 5 (CAS 356783-16-9)
- Favipiravir Impurity 18 (CAS 259793-97-0)
- Favipiravir Impurity 13 (CAS CATO-C4X-210213)
- Favipiravir-13C3 (CAS CATO-C4X-210210)
- Favipiravir-13C3 (CAS CATO-CCAD303706)
- Favipiravir Impurity 8 (CAS 356783-29-4)
Recommended Standards
- 5-Fluoro-3-nitrobenzene-1,2-diol (CAS 698985-45-4)
- (2-Aminophenyl)phosphonic acid (CAS 7472-16-4)
- 5-(Trifluoromethyl)pyrimidine-2-carbonitrile (CAS 944905-38-8)
- (4-Aminophenyl)phosphonic acid (CAS 5337-17-7)
- Neratinib Impurity 20 (CAS CATO-C4X-113420)
- Tadalafil EP Impurity E (CAS 2520114-41-2)
- Tocopherol impurity 39 (CAS 51028-70-7)
- Melitracen Impurity 19 (CAS CATO-C4X-120219)
- 4-bromo-1-methyl-1H-pyrazolo[3,4-d]pyrimidine (CAS 83255-88-3)
- 2-Ethoxy-7-methoxy-8-methylquinolin-4-ol (CAS 872496-85-0)
- 5-Fluoro-1-[4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione (CAS 2968-28-7)
- (2S)-1,3-Diphenylpropyl 1-(3,3-dimethyl-2-oxopentanoyl)piperidine-2-carboxylate (CAS 200417-73-8)
- Acetic acid ethenyl ester, polymer with ethenol, (2Z)-2-butenedioate (CAS 72828-12-7)
- Influenza PR8 Hemagglutinin Peptide (110-119) (H-6312.0005) (CAS 132031-50-6)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com