5-(2-Thienyl)isoxazole-3-carboxylic Acid

5-(2-噻吩基)异噁唑-3-甲酸

Also known as: 5-(2-Thienyl)-3-isoxazolecarboxylic acid, 5-Thiophen-2-yl-isoxazole-3-carboxylic acid, 5-Thien-2-ylisoxazole-3-carboxylic acid, 5-(Thiophen-2-yl)isoxazole-3-carboxylic acid, AKOS B020713, OTAVA-BB BB7020410126, RARECHEM AL BE 1296, SALOR-INT L482587-1EA, TIMTEC-BB SBB006949

5-(2-Thienyl)isoxazole-3-carboxylic Acid (CAS 763109-71-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H5NO3S and a molecular weight of 195.19500 g/mol. It is also known as 5-(2-Thienyl)-3-isoxazolecarboxylic acid, 5-Thiophen-2-yl-isoxazole-3-carboxylic acid and 5-Thien-2-ylisoxazole-3-carboxylic acid. Key properties include a melting point of 168ºC, a boiling point of 443.4ºC at 760 mmHg, a density of 1.47g/cm3 and a flash point of 221.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
763109-71-3
Jingsj CID
J-1132806-1
Molecular Formula
C8H5NO3S
Chinese Name
5-(2-噻吩基)异噁唑-3-甲酸
Molecular Weight
195.19500 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point168ºC
Boiling Point443.4ºC at 760 mmHg
Density1.47g/cm3
Flash Point221.9ºC

Frequently Asked Questions

What is the CAS number of 5-(2-Thienyl)isoxazole-3-carboxylic Acid?

The CAS number of 5-(2-Thienyl)isoxazole-3-carboxylic Acid is 763109-71-3.

What are the molecular formula and molecular weight of 5-(2-Thienyl)isoxazole-3-carboxylic Acid?

5-(2-Thienyl)isoxazole-3-carboxylic Acid has molecular formula C8H5NO3S and molecular weight 195.19500 g/mol.

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

Last updated:

How to cite: Jingsj. "5-(2-Thienyl)isoxazole-3-carboxylic Acid (CAS 763109-71-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1132806-1 (accessed 2026-10-26).

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