3,4-dichloro-5-hydroxy-5H-furan-2-one
Also known as: 3,4-dichloro-5-hydroxyfuran-2(5H)-one, 3,4-dichloro-2-hydroxy-2H-furan-5-one, 3,4-dichloro-5-hydroxy-3H-furan-2-one, 3,4-dichloro-5-hydroxy-2,5-dihydrofuran-2-one, 3,4-(dichloro)-5-hydroxy-2(5H)-furanone, Mucochloric acid lactone, LDS-int A
3,4-dichloro-5-hydroxy-5H-furan-2-one (CAS 766-40-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H2Cl2O3 and a molecular weight of 168.963 g/mol. Key properties include a boiling point of 367.2±42.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 100.0±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 766-40-5
- Jingsj CID
- J-922417-3
- Molecular Formula
- C4H2Cl2O3
- Molecular Weight
- 168.963 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 367.2±42.0 °C at 760 mmHg |
|---|---|
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 100.0±0.0 °C |
| Exact Mass | 167.938095 |
| PSA | 46.53000 |
| LogP | -0.26 |
| Vapor Pressure | 0.0±1.9 mmHg at 25°C |
| Refractive Index | 1.573 |
Customs & Trade Information
| HS Code | 2932209090 |
|---|---|
| Summary | 2932209090. other lactones. 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 3,4-dichloro-5-hydroxy-5H-furan-2-one?
The CAS number of 3,4-dichloro-5-hydroxy-5H-furan-2-one is 766-40-5.
What are the molecular formula and molecular weight of 3,4-dichloro-5-hydroxy-5H-furan-2-one?
3,4-dichloro-5-hydroxy-5H-furan-2-one has molecular formula C4H2Cl2O3 and molecular weight 168.963 g/mol.
What are the upstream and downstream products of 3,4-dichloro-5-hydroxy-5H-furan-2-one?
For 3,4-dichloro-5-hydroxy-5H-furan-2-one, Upstream Products: Furfural, 2-Furoic acid, 2,3,4,4-tetrachlorocyclobut-2-en-1-one; Downstream Products: 4,5-Dichloro-2-(4-methylphenyl)-2,3-dihydropyridazin-3-one, 4,5-Dichloro-2-m-tolylpyridazin-3(2H)-one, 3,4-dichloro-5-isopropoxy-2(5H)-furanone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,4-dichloro-5-hydroxy-5H-furan-2-one (CAS 766-40-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-922417-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.