3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid

Also known as: 3-(2-Chloro-6-fluorophenyl)-5-methyl-4-isoxazolecarboxylic acid, Flucloxacillin impurity D, MFCD00055659, EINECS 223-486-8

3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 3919-74-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H7ClFNO3 and a molecular weight of 255.63000 g/mol. Key properties include a melting point of 202 °C, a boiling point of 314.6ºC at 760 mmHg, a density of 1.388g/cm3 and a flash point of 144.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3919-74-2
Jingsj CID: J-17026-3
Molecular Formula: C₁₁H₇ClFNO₃
Molecular Weight: 255.63000 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	202 °C
Boiling Point	314.6ºC at 760 mmHg
Density	1.388g/cm3
Flash Point	144.1ºC
Exact Mass	255.01000
PSA	63.33000
LogP	3.14070
Refractive Index	1.533

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 3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid?

The CAS number of 3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid is 3919-74-2.

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

3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid has molecular formula C11H7ClFNO3 and molecular weight 255.63000 g/mol.

What are the upstream and downstream products of 3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid?

For 3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid, Upstream Products: 2-Chloro-6-fluorobenzaldehyde, Methyl acetoacetate, Methyl 3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylate; Downstream Products: 3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamide.

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. "3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 3919-74-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-17026-3 (accessed 2026-11-09).

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