3-Hydroxypyrazine-2-carboxamide
Also known as: 3-Hydroxy-2-pyrazinecarboxamide, 3-Hydroxypyrazine-2-carboxylic acid amide, 2-oxo-1H-pyrazine-3-carboxamide, Favipiravir intermediate, Favipiravir Impurity, Pyrazine-2-carboxamide, 3-hydroxy-, Pyrazinecarboxamide, 3,4-dihydro-3-oxo-
3-Hydroxypyrazine-2-carboxamide (CAS 55321-99-8) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C5H5N3O2 and a molecular weight of 139.112 g/mol. Key properties include a melting point of ca 270℃, a boiling point of 640.8±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 341.3±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 55321-99-8
- Jingsj CID
- J-1958015-5
- Molecular Formula
- C5H5N3O2
- Molecular Weight
- 139.112 g/mol
- Category
- Organic Bases
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | ca 270℃ |
|---|---|
| Boiling Point | 640.8±55.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 341.3±31.5 °C |
| Exact Mass | 139.038177 |
| PSA | 89.10000 |
| LogP | 0.32 |
| Vapor Pressure | 0.0±2.0 mmHg at 25°C |
| Refractive Index | 1.634 |
Activity & Biological Data
| Target | Viral polymerase[1] |
|---|---|
| Additional Information | [1]. Huchting J, et al. Cell line-dependent activation and antiviral activity of T-1105, the non-fluorinated analogue of T-705 (favipiravir). Antiviral Res. 2019 Jul;167:1-5. [2]. Furuta Y, et al. T-705 (favipiravir) and related compounds: Novel broad-spectrum inhibitors of RNA viral infections. Antiviral Res. 2009 Jun;82(3):95-102. |
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 3-Hydroxypyrazine-2-carboxamide?
The CAS number of 3-Hydroxypyrazine-2-carboxamide is 55321-99-8.
What are the molecular formula and molecular weight of 3-Hydroxypyrazine-2-carboxamide?
3-Hydroxypyrazine-2-carboxamide has molecular formula C5H5N3O2 and molecular weight 139.112 g/mol.
What are the upstream and downstream products of 3-Hydroxypyrazine-2-carboxamide?
For 3-Hydroxypyrazine-2-carboxamide, Upstream Products: 2-aminopropanediamide, Methyl 3-hydroxypyrazine-2-carboxylate, 3-hydroxypyrazine-2-carboxylic acid; Downstream Products: 3-Aminopyrazin-2(1H)-one, 3,6-dichloropyrazine-2-carbonitrile, 3-hydroxypyrazine-2-carboxylic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Hydroxypyrazine-2-carboxamide (CAS 55321-99-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1958015-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.