Favipiravir Impurity 5 CAS 356783-16-9
| CAS No. | 356783-16-9 |
| Molecular Formula | C5HCl2N3 |
| Molecular Weight | 173.99 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Favipiravir Impurity 5 (CAS 356783-16-9) is a certified pharmaceutical impurity reference standard with the molecular formula C5HCl2N3 and a molecular weight of 173.99 g/mol.
Owing to a nitrile group, chlorine substitution, Favipiravir Impurity 5 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 173.99 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures Favipiravir Impurity 5 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5HCl2N3 |
| Molecular Weight | 173.99 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Favipiravir Standards
- Favipiravir Impurity 2 (CAS 259793-90-3)
- Favipiravir Impurity 1 (CAS CATO-C4X-21021)
- Favipiravir Impurity 23 (CAS 2091074-00-7)
- 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
- 4,6-Dichloropyrimidine-5-carbonitrile (CAS 5305-45-3)
- (E)-2-(1-Butenyl)-1,3,2-benzodioxaborole (CAS 106094-36-4)
- 4,6-Dichloropyridazine-3-carbonitrile (CAS 35857-90-0)
- 4-Amino-6-bromopyrimidine (CAS 1159818-57-1)
- Oseltamivir Impurity 153 (CAS CATO-C4X-1720153)
- Mitiglinide Impurity 11 (CAS CATO-C4X-116111)
- Atazanavir Sulfate EP Impurity A (CAS 4385-62-0)
- (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (CAS 6730-10-5)
- Minocycline Impurity (CAS 27179-27-7)
- (E)-2-(difluoromethoxy)-3-methoxybenzaldehyde oxime (CAS 1245782-74-4)
- 2-(Cyclohexyloxy)pyridin-3-amine (CAS 147143-56-4)
- 871727-05-8 6-(tert-Butoxycarbonyl)-6-azaspiro[2.5]octane-1-carboxylic acid DTXSID40656404 (CAS 871727-05-8)
- 1-(5-Bromo-3-methyl-2-pyridinyl)-1,2,3,4-tetrahydroquinoline (CAS 1220017-22-0)
- Gastric Inhibitory Polypeptide (3-42) (human) trifluoroacetate salt (CAS 1802086-25-4)
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