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3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid

Also known as: 3-(4-Fluorophenyl)-5-methyl-4-isoxazolecarboxylic acid, 3-(4-Fluorophenyl)-5-methyl-1,2-oxazole-4-carboxylic acid, 4-Isoxazolecarboxylic acid, 3-(4-fluorophenyl)-5-methyl-, 3-(4-Fluorophenyl)-5-methylisoxazol-4-carboxylic acid

3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 1736-21-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H8FNO3 and a molecular weight of 221.18500 g/mol. Key properties include a melting point of 198-202ºC, a boiling point of 361.6ºC at 760mmHg, a density of 1.35g/cm3 and a flash point of 172.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1736-21-6
Jingsj CID
J-1083727-1
Molecular Formula
C11H8FNO3
Molecular Weight
221.18500 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point198-202ºC
Boiling Point361.6ºC at 760mmHg
Density1.35g/cm3
Flash Point172.5ºC
Exact Mass221.04900
PSA63.33000
LogP2.48730
Vapor Pressure7.36E-06mmHg at 25°C
Refractive Index1.56

Customs & Trade Information

HS Code2934999090
Summary2934999090. 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-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid?

The CAS number of 3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid is 1736-21-6.

What are the molecular formula and molecular weight of 3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid?

3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid has molecular formula C11H8FNO3 and molecular weight 221.18500 g/mol.

What are the upstream and downstream products of 3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid?

For 3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid, Upstream Products: Ethyl 3-(4-fluorophenyl)-5-methylisoxazole-4-carboxylate, 4-Fluorobenzaldehyde oxime, ALPHA-CHLORO-4-FLUOROBENZALDOXIME; Downstream Products: 3-(4-Fluorophenyl)-5-methylisoxazole-4-carbonyl chloride, 3-(4-Fluorophenyl)-5-methylisoxazole.

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

Last updated:

How to cite: Jingsj. "3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 1736-21-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1083727-1 (accessed 2026-11-09).

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