5-methoxy-1-benzofuran-3(2H)-one
Also known as: 5-Methoxy-3(2H)-benzofuranone, 5-Methoxy-benzofuran-3-one, 5-Methoxybenzofuran-3(2H)-one, 3(2H)-Benzofuranone, 5-methoxy-, 5-methoxy-2,3-dihydro-1-benzofuran-3-one, 5-methoxy-2,3-dihydrobenzofuran-3-one, AKOS BC-0911
5-methoxy-1-benzofuran-3(2H)-one (CAS 39581-55-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H8O3 and a molecular weight of 164.158 g/mol. Key properties include a boiling point of 299.4±39.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 125.7±13.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 39581-55-0
- Jingsj CID
- J-1103460-9
- Molecular Formula
- C9H8O3
- Molecular Weight
- 164.158 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 299.4±39.0 °C at 760 mmHg |
|---|---|
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 125.7±13.5 °C |
| Exact Mass | 164.047348 |
| PSA | 35.53000 |
| LogP | 1.73 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.563 |
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen 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-methoxy-1-benzofuran-3(2H)-one?
The CAS number of 5-methoxy-1-benzofuran-3(2H)-one is 39581-55-0.
What are the molecular formula and molecular weight of 5-methoxy-1-benzofuran-3(2H)-one?
5-methoxy-1-benzofuran-3(2H)-one has molecular formula C9H8O3 and molecular weight 164.158 g/mol.
What are the upstream and downstream products of 5-methoxy-1-benzofuran-3(2H)-one?
For 5-methoxy-1-benzofuran-3(2H)-one, Upstream Products: Chloroacetonitrile, 4-Methoxyphenol, 2-(4-Methoxyphenoxy)acetic acid; Downstream Products: 5-Methoxybenzofuran.
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-methoxy-1-benzofuran-3(2H)-one (CAS 39581-55-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1103460-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.