Thiophene-3,4-dicarboxylic acid
Also known as: 3,4-Dicarboxythiophene, 3,4-Thiophenedicarboxylic acid, THIOPHENE-3,4-DICARBOXYLIC ACID, Thiophene-3,4-Dicarboxylic Acid, 3,4-Thiophenedicarboxylate, NSC 672208, NSC 81793, MFCD00067079
Thiophene-3,4-dicarboxylic acid (CAS 4282-29-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H4O4S and a molecular weight of 172.159 g/mol. Key properties include a melting point of 227-231ºC, a boiling point of 405.9±30.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 199.3±24.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4282-29-5
- Jingsj CID
- J-1523779-3
- Molecular Formula
- C6H4O4S
- Molecular Weight
- 172.159 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 227-231ºC |
|---|---|
| Boiling Point | 405.9±30.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 199.3±24.6 °C |
| Exact Mass | 171.983032 |
| PSA | 102.84000 |
| LogP | 0.35 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.663 |
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 Thiophene-3,4-dicarboxylic acid?
The CAS number of Thiophene-3,4-dicarboxylic acid is 4282-29-5.
What are the molecular formula and molecular weight of Thiophene-3,4-dicarboxylic acid?
Thiophene-3,4-dicarboxylic acid has molecular formula C6H4O4S and molecular weight 172.159 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. "Thiophene-3,4-dicarboxylic acid (CAS 4282-29-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523779-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.