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3-ethoxythiophene-2-carboxylic acid

3-乙氧基噻吩-2-羧酸

Also known as: 2-Thiophenecarboxylic acid, 3-ethoxy-, 3-Ethoxy-2-thiophenecarboxylic acid, 3-Ethoxy-thiophene-2-carboxylic acid, 3-ethoxy-2-thiophenecarboxylic acid, 3-ethoxythiophene-2-carboxylic acid, 3-ethoxythien-2-carboxylic acid

3-ethoxythiophene-2-carboxylic acid (CAS 139926-23-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H8O3S and a molecular weight of 172.20200 g/mol. It is also known as 2-Thiophenecarboxylic acid, 3-ethoxy-, 3-Ethoxy-2-thiophenecarboxylic acid and 3-Ethoxy-thiophene-2-carboxylic acid. Key properties include a melting point of 121-123ºC, a boiling point of 305.3ºC at 760mmHg, a density of 1.305g/cm3 and a flash point of 138.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
139926-23-1
Jingsj CID
J-3454-6
Molecular Formula
C7H8O3S
Chinese Name
3-乙氧基噻吩-2-羧酸
Molecular Weight
172.20200 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point121-123ºC
Boiling Point305.3ºC at 760mmHg
Density1.305g/cm3
Flash Point138.4ºC

Frequently Asked Questions

What is the CAS number of 3-ethoxythiophene-2-carboxylic acid?

The CAS number of 3-ethoxythiophene-2-carboxylic acid is 139926-23-1.

What are the molecular formula and molecular weight of 3-ethoxythiophene-2-carboxylic acid?

3-ethoxythiophene-2-carboxylic acid has molecular formula C7H8O3S and molecular weight 172.20200 g/mol.

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

Last updated:

How to cite: Jingsj. "3-ethoxythiophene-2-carboxylic acid (CAS 139926-23-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3454-6 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.