3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid

3-(2,6-二氯苯基)-5-甲基异噁唑-4-羧酸

Also known as: 3-(2,6-dichlorophenyl)-5-methyl-4-isoxazolecarboxylic acid, 5-methyl-3-(2,6-dichlorophenyl)isoxazole-4-carboxylic acid, 3-(2,6-dichlorophenyl)-5-methyl-1,2-oxazole-4-carboxylic acid, dicloxacillin EP impurity D, MFCD00051658

3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 3919-76-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H7Cl2NO3 and a molecular weight of 272.084 g/mol. It is also known as 3-(2,6-dichlorophenyl)-5-methyl-4-isoxazolecarboxylic acid, 5-methyl-3-(2,6-dichlorophenyl)isoxazole-4-carboxylic acid and 3-(2,6-dichlorophenyl)-5-methyl-1,2-oxazole-4-carboxylic acid. Key properties include a melting point of 221 °C, a boiling point of 383.6±37.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 185.8±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
3919-76-4
Jingsj CID
J-1589662-7
Molecular Formula
C11H7Cl2NO3
Chinese Name
3-(2,6-二氯苯基)-5-甲基异噁唑-4-羧酸
Molecular Weight
272.084 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point221 °C
Boiling Point383.6±37.0 °C at 760 mmHg
Density1.5±0.1 g/cm3
Flash Point185.8±26.5 °C

Frequently Asked Questions

What is the CAS number of 3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid?

The CAS number of 3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid is 3919-76-4.

What are the molecular formula and molecular weight of 3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid?

3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid has molecular formula C11H7Cl2NO3 and molecular weight 272.084 g/mol.

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

Last updated:

How to cite: Jingsj. "3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 3919-76-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1589662-7 (accessed 2026-10-22).

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