3-Hydroxypyrazine-2-carboxamide
3-羟基吡嗪-2-酰胺
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. It is also known as 3-Hydroxy-2-pyrazinecarboxamide, 3-Hydroxypyrazine-2-carboxylic acid amide and 2-oxo-1H-pyrazine-3-carboxamide. 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-1958015-9
- Molecular Formula
- C5H5N3O2
- Chinese Name
- 3-羟基吡嗪-2-酰胺
- 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 |
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.
Data compiled from public chemical databases 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-1958015-9 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.