Favipiravir Impurity 24 CAS CATO-C4X-210224
| CAS No. | CATO-C4X-210224 |
| Molecular Formula | C11H11NO4 |
| Molecular Weight | 221.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Favipiravir Impurity 24 (CAS CATO-C4X-210224), a pharmacopoeial impurity reference standard (molecular formula C11H11NO4, MW 221.21 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Favipiravir Impurity 24 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 221.21 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).
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.
Physical & Chemical Properties
| Molecular Formula | C11H11NO4 |
| Molecular Weight | 221.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Favipiravir Standards
- 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 24 (CAS 6966-01-4)
- Favipiravir Impurity 23 (CAS 356783-14-7)
- Favipiravir Impurity 4 (CAS 259794-06-4)
- Favipiravir Impurity 16 (CAS 1023813-21-9)
Recommended Standards
- Cabozantinib Impurity 41 (CAS 2105956-20-3)
- Semaglutide Impurity 139 (CAS CATO-C4X-2226139)
- Cabozantinib Impurity 39 (CAS CATO-C4X-201839)
- Finerenone Impurity 190 (CAS CATO-C4X-2880190)
- Brivaracetam impurity 97 (CAS 1314557-10-2)
- Suzetrigine Impurity 57 (CAS CATO-C4X-336957)
- Pethidine Impurity 12 (CAS 13147-07-4)
- trimethylfuran-3-carboxylic acid (CAS 28730-32-7)
- (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-chloro-3-fluorophenyl)propanoic acid (CAS 1629658-27-0)
- 2,6-Difluoro-4-nitrophenacyl bromide (CAS 1803827-60-2)
- Niaproof<SUP>®</SUP> 4 (CAS 139-88-8)
- 4-Methoxy-3-(propionylamino)benzoic acid (CAS 712286-88-9)
- methyl[(pyridazin-3-yl)methyl]amine (CAS 1083299-93-7)
- a2,3-Sialylglycopeptide (CAS 189035-43-6)
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