Favipiravir
Also known as: 6-Fluoro-3-hydroxypyrazine-2-carboxamide, 6-Fluoro-3,4-dihydro-3-oxo-2-pyrazinecarboxamide, 5-fluoro-2-oxo-1H-pyrazine-3-carboxamide, 6-fluoro-3-oxo-3,4-dihydropyrazine-2-carboxamide, Avigan, T-705, 2-Pyrazinecarboxamide, 6-fluoro-3-hydroxy-, 6-fluoro-3,4-dihydro-3-oxo-Pyrazinecarboxamide, 6-fluoro-3-hydroxy-2-pyrazinecarboxamide, EW5GL2X7E0
Favipiravir (CAS 259793-96-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C5H4FN3O2 and a molecular weight of 157.103 g/mol. Key properties include a melting point of 192 °C, a boiling point of 552.6±50.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 288.0±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 259793-96-9
- Jingsj CID
- J-1974650-0
- Molecular Formula
- C5H4FN3O2
- Molecular Weight
- 157.103 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 192 °C |
|---|---|
| Boiling Point | 552.6±50.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 288.0±30.1 °C |
| Exact Mass | 157.028748 |
| PSA | 88.84000 |
| LogP | 0.78 |
| Vapor Pressure | 0.0±1.5 mmHg at 25°C |
| Refractive Index | 1.600 |
Activity & Biological Data
| Target | IC50: 341 nM (RdRP)[1] |
|---|---|
| Additional Information | [1]. Furuta Y, et al. Favipiravir (T-705), a novel viral RNA polymerase inhibitor. Antiviral Res. 2013 Nov;100(2):446-54. [2]. Rocha-Pereira J, et al. Favipiravir (T-705) inhibits in vitro norovirus replication. Biochem Biophys Res Commun. 2012 Aug 10;424(4):777-80. |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Favipiravir?
The CAS number of Favipiravir is 259793-96-9.
What are the molecular formula and molecular weight of Favipiravir?
Favipiravir has molecular formula C5H4FN3O2 and molecular weight 157.103 g/mol.
What are the upstream and downstream products of Favipiravir?
For Favipiravir, Upstream Products: 3-Hydroxypyrazine-2-carboxamide, 3,6-dichloropyrazine-2-carbonitrile.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Favipiravir (CAS 259793-96-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1974650-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.