5-(4-Methoxyphenyl)isoxazole-3-carboxylic acid

Also known as: 5-(4-Methoxyphenyl)-1,2-oxazole-3-carboxylic acid, 3-Isoxazolecarboxylic acid, 5-(4-methoxyphenyl)-, 5-(4-Methoxyphenyl)-1,2-oxazole-3-carboxylic acid, MFCD02130994

5-(4-Methoxyphenyl)isoxazole-3-carboxylic acid (CAS 33282-16-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H9NO4 and a molecular weight of 219.193 g/mol. Key properties include a melting point of 181ºC (dec.)(lit.), a boiling point of 461.1±40.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 232.7±27.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 33282-16-5
Jingsj CID: J-23676-0
Molecular Formula: C₁₁H₉NO₄
Molecular Weight: 219.193 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	181ºC (dec.)(lit.)
Boiling Point	461.1±40.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	232.7±27.3 °C
Exact Mass	219.053162
PSA	72.56000
LogP	2.57
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.570

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 5-(4-Methoxyphenyl)isoxazole-3-carboxylic acid?

The CAS number of 5-(4-Methoxyphenyl)isoxazole-3-carboxylic acid is 33282-16-5.

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

5-(4-Methoxyphenyl)isoxazole-3-carboxylic acid has molecular formula C11H9NO4 and molecular weight 219.193 g/mol.

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. "5-(4-Methoxyphenyl)isoxazole-3-carboxylic acid (CAS 33282-16-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23676-0 (accessed 2026-11-09).

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