![Molecular structure of 5-Chlorobenzo[b]thiophene-2-carboxylic acid (CAS 13771-75-0)](/images/chem_structures_svg/287/13771-75-0.svg)
5-Chlorobenzo[b]thiophene-2-carboxylic acid
Also known as: 5-Chloro-1-benzothiophene-2-carboxylic acid, 5-Chloro-2-benzothiophenecarboxylic acid, 5-Chlorobenzothiophene-2-carboxylic acid, 2-Carboxy-5-chlorobenzo[b]thiophene
5-Chlorobenzo[b]thiophene-2-carboxylic acid (CAS 13771-75-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H5ClO2S and a molecular weight of 212.653 g/mol. Key properties include a melting point of 256-258ºC, a boiling point of 408.6±25.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 200.9±23.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 13771-75-0
- Jingsj CID
- J-1110740-7
- Molecular Formula
- C9H5ClO2S
- Molecular Weight
- 212.653 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 256-258ºC |
|---|---|
| Boiling Point | 408.6±25.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 200.9±23.2 °C |
| Exact Mass | 211.969879 |
| PSA | 65.54000 |
| LogP | 4.58 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.720 |
| 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 5-Chlorobenzo[b]thiophene-2-carboxylic acid?
The CAS number of 5-Chlorobenzo[b]thiophene-2-carboxylic acid is 13771-75-0.
What are the molecular formula and molecular weight of 5-Chlorobenzo[b]thiophene-2-carboxylic acid?
5-Chlorobenzo[b]thiophene-2-carboxylic acid has molecular formula C9H5ClO2S and molecular weight 212.653 g/mol.
What are the upstream and downstream products of 5-Chlorobenzo[b]thiophene-2-carboxylic acid?
For 5-Chlorobenzo[b]thiophene-2-carboxylic acid, Upstream Products: 5-Chloro-1-benzothiophene, tert-Butyllithium, Methyl 5-chloro-1-benzothiophene-2-carboxylate; Downstream Products: 5-Chloro-1-benzothiophene.
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-Chlorobenzo[b]thiophene-2-carboxylic acid (CAS 13771-75-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1110740-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.