5-Formyl-2-thiophenecarboxylic acid
Also known as: 5-Formyl-2-thiophenecarboxylic Acid, 5-Formylthiophene-2-carboxylic acid, 5-Formylthenoic acid, 5-Carboxythiophene-2-carboxaldehyde, 2-Carboxy-5-formylthiophene, 5-Formyl-2-thenoic acid, 5-Formyl-thiophene-2-carboxylic acid, 5-Formyl-thiophen-2-carboxylic acid, 5-Formylthenoic Acid, MFCD00191437
5-Formyl-2-thiophenecarboxylic acid (CAS 4565-31-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H4O3S and a molecular weight of 156.159 g/mol. Key properties include a melting point of 169 °C, a boiling point of 371.4±27.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 178.4±23.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4565-31-5
- Jingsj CID
- J-1966395-7
- Molecular Formula
- C6H4O3S
- Molecular Weight
- 156.159 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 169 °C |
|---|---|
| Boiling Point | 371.4±27.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 178.4±23.7 °C |
| Exact Mass | 155.988113 |
| PSA | 82.61000 |
| LogP | 0.98 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.666 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. 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-Formyl-2-thiophenecarboxylic acid?
The CAS number of 5-Formyl-2-thiophenecarboxylic acid is 4565-31-5.
What are the molecular formula and molecular weight of 5-Formyl-2-thiophenecarboxylic acid?
5-Formyl-2-thiophenecarboxylic acid has molecular formula C6H4O3S and molecular weight 156.159 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-Formyl-2-thiophenecarboxylic acid (CAS 4565-31-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1966395-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.