5-Methylpyrazin-2(1H)-one
Also known as: 2-Hydroxy-5-methylpyrazine, 5-Methylpyrazin-2-ol, 5-Methyl-2(1H)-pyrazinone, 2(1H)-Pyrazinone, 5-methyl-, 5-Methyl-1H-pyrazin-2-one
5-Methylpyrazin-2(1H)-one (CAS 20721-17-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C5H6N2O and a molecular weight of 110.114 g/mol. Key properties include a boiling point of 376.2ºC at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 181.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 20721-17-9
- Jingsj CID
- J-1157051-7
- Molecular Formula
- C5H6N2O
- Molecular Weight
- 110.114 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 376.2ºC at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 181.3ºC |
| Exact Mass | 110.048012 |
| PSA | 46.01000 |
| LogP | -0.90 |
| Vapor Pressure | 3.41E-06mmHg at 25°C |
| Refractive Index | 1.577 |
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 5-Methylpyrazin-2(1H)-one?
The CAS number of 5-Methylpyrazin-2(1H)-one is 20721-17-9.
What are the molecular formula and molecular weight of 5-Methylpyrazin-2(1H)-one?
5-Methylpyrazin-2(1H)-one has molecular formula C5H6N2O and molecular weight 110.114 g/mol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methylpyrazin-2(1H)-one (CAS 20721-17-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1157051-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.