![Molecular structure of Thieno[3,2-b]thiophene-2-carboxylic acid (CAS 1723-27-9)](/images/chem_structures_svg/239/1723-27-9.svg)
Thieno[3,2-b]thiophene-2-carboxylic acid
Also known as: 2-carboxy-thieno[3,2-b]thiophene, BTH-COOH, MFCD00115174, THI073, Thieno[3,2-b]thiophene-2-carboxylic acid
Thieno[3,2-b]thiophene-2-carboxylic acid (CAS 1723-27-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H4O2S2 and a molecular weight of 184.236 g/mol. Key properties include a melting point of 225-227ºC, a boiling point of 386.7±22.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 187.6±22.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1723-27-9
- Jingsj CID
- J-1329867-4
- Molecular Formula
- C7H4O2S2
- Molecular Weight
- 184.236 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 225-227ºC |
|---|---|
| Boiling Point | 386.7±22.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 187.6±22.3 °C |
| Exact Mass | 183.965271 |
| PSA | 93.78000 |
| LogP | 4.91 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.770 |
| Storage Conditions | 2-8°C |
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 Thieno[3,2-b]thiophene-2-carboxylic acid?
The CAS number of Thieno[3,2-b]thiophene-2-carboxylic acid is 1723-27-9.
What are the molecular formula and molecular weight of Thieno[3,2-b]thiophene-2-carboxylic acid?
Thieno[3,2-b]thiophene-2-carboxylic acid has molecular formula C7H4O2S2 and molecular weight 184.236 g/mol.
What are the upstream and downstream products of Thieno[3,2-b]thiophene-2-carboxylic acid?
For Thieno[3,2-b]thiophene-2-carboxylic acid, Upstream Products: Ethyl thieno[3,2-b]thiophene-2-carboxylate, 3-Bromothiophene-2-carbaldehyde, 2-Thiophenecarboxaldehyde; Downstream Products: 2,3,5-tribromothieno[3,2-b]thiophene, Methyl thieno[3,2-b]thiophene-2-carboxylate, 2,3,5,6-Tetrabromothieno[3,2-b]thiophene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Thieno[3,2-b]thiophene-2-carboxylic acid (CAS 1723-27-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1329867-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.