![Molecular structure of Benzo[b]thiophene-3-carboxylic acid (CAS 5381-25-9)](/images/chem_structures_svg/001/5381-25-9.svg)
Benzo[b]thiophene-3-carboxylic acid
Also known as: 1-Benzothiophene-3-carboxylic acid, Benzothiophene-3-carboxylic acid, 1-BENZOTHIOPHENE-3-CARBOXYLIC ACID, BENZO[B]THIOPHENE-3-CARBOXYLIC ACID, MFCD01846406, AKOS B007499, ART-CHEM-BB B007499, RARECHEM AL BE 0712, TIMTEC-BB SBB007035
Benzo[b]thiophene-3-carboxylic acid (CAS 5381-25-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H6O2S and a molecular weight of 178.208 g/mol. Key properties include a melting point of 174 °C, a boiling point of 376.2±15.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 181.3±20.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5381-25-9
- Jingsj CID
- J-27025-7
- Molecular Formula
- C9H6O2S
- Molecular Weight
- 178.208 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 174 °C |
|---|---|
| Boiling Point | 376.2±15.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 181.3±20.4 °C |
| Exact Mass | 178.008850 |
| PSA | 65.54000 |
| LogP | 4.06 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.717 |
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 Benzo[b]thiophene-3-carboxylic acid?
The CAS number of Benzo[b]thiophene-3-carboxylic acid is 5381-25-9.
What are the molecular formula and molecular weight of Benzo[b]thiophene-3-carboxylic acid?
Benzo[b]thiophene-3-carboxylic acid has molecular formula C9H6O2S and molecular weight 178.208 g/mol.
What are the upstream and downstream products of Benzo[b]thiophene-3-carboxylic acid?
For Benzo[b]thiophene-3-carboxylic acid, Upstream Products: 3-bromo-1-benzothiophene, Carbon dioxide, Methanol; Downstream Products: 1-benzothiophene-3-carbonyl chloride, 1-benzothiophen-3-ylmethanol, 5-bromobenzo[b]thiophene-3-carboxylic 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. "Benzo[b]thiophene-3-carboxylic acid (CAS 5381-25-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27025-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.