4-Oxopent-2-enoic acid
Also known as: 3-Acetylacrylic acid, 4-Oxopent-2-enoic acid, 4-Oxo-2-pentenoic acid, 4-Ketopent-2-enoic acid, 4-Ketopentenoic acid, beta-Acetylacrylic acid, Dehydrolevulinic acid, Acetacrylsaeure
4-Oxopent-2-enoic acid (CAS 4743-82-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H6O3 and a molecular weight of 114.09900 g/mol. Key properties include a melting point of 123-124ºC, a boiling point of 269.7ºC at 760 mmHg, a density of 1.183g/cm3 and a flash point of 131.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4743-82-2
- Jingsj CID
- J-48328-3
- Molecular Formula
- C5H6O3
- Molecular Weight
- 114.09900 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 123-124ºC |
|---|---|
| Boiling Point | 269.7ºC at 760 mmHg |
| Density | 1.183g/cm3 |
| Flash Point | 131.2ºC |
| Exact Mass | 114.03200 |
| PSA | 54.37000 |
| LogP | 0.21620 |
| Refractive Index | 1.469 |
Customs & Trade Information
| HS Code | 2918300090 |
|---|---|
| Summary | 2918300090 other carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Oxopent-2-enoic acid?
The CAS number of 4-Oxopent-2-enoic acid is 4743-82-2.
What are the molecular formula and molecular weight of 4-Oxopent-2-enoic acid?
4-Oxopent-2-enoic acid has molecular formula C5H6O3 and molecular weight 114.09900 g/mol.
What are the upstream and downstream products of 4-Oxopent-2-enoic acid?
For 4-Oxopent-2-enoic acid, Upstream Products: Levulinic acid, 1,2,4-Benzenetriol, acetic acid; Downstream Products: Methyl Acetylacrylate, Levulinic acid, Pentanoic 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. "4-Oxopent-2-enoic acid (CAS 4743-82-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48328-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.