4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid

Also known as: 4,5,6,7-TETRAHYDRO-BENZO[B]THIOPHENE-2-CARBOXYLIC ACID, 4,5,6,7-Tetrahydro-1-benzothiophene-2-carboxylic acid, 2-Carboxy-4,5,6,7-tetrahydrobenzo[b]thiophene, 2-Carboxy-4,5,6,7-tetrahydro-1-benzothiophene, 4,5,6,7-tetrahydro-1-benzothiophene-2-carboxylate

4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid (CAS 40133-07-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H10O2S and a molecular weight of 182.240 g/mol. Key properties include a melting point of 196°C, a boiling point of 368.1±42.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 176.4±27.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 40133-07-1
Jingsj CID: J-1437553-2
Molecular Formula: C₉H₁₀O₂S
Molecular Weight: 182.240 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	196°C
Boiling Point	368.1±42.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	176.4±27.9 °C
Exact Mass	182.040146
PSA	65.54000
LogP	3.26
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.617
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 4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid?

The CAS number of 4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid is 40133-07-1.

What are the molecular formula and molecular weight of 4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid?

4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid has molecular formula C9H10O2S and molecular weight 182.240 g/mol.

What are the upstream and downstream products of 4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid?

For 4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid, Upstream Products: Carbon dioxide, 4,5,6,7-Tetrahydrobenzo[b]thiophene, 6,7-Dihydro-1-benzothiophen-4(5H)-one; Downstream Products: Benzo[b]thiophene-2-carbonyl chloride, 4,5,6,7-tetrahydro- (9CI).

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "4,5,6,7-Tetrahydrobenzo[b]thiophene-2-carboxylic acid (CAS 40133-07-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1437553-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.