3-Methoxyisoxazole-5-carboxylic acid

Also known as: 3-Methoxy-5-isoxazolecarboxylic acid, 5-Carboxy-3-methoxyisoxazole, 3-Methoxy-1,2-oxazole-5-carboxylic acid, 5-Isoxazolecarboxylic acid, 3-methoxy-

3-Methoxyisoxazole-5-carboxylic acid (CAS 13626-59-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H5NO4 and a molecular weight of 143.09700 g/mol. Key properties include a boiling point of 348.6ºC at 760mmHg, a density of 1.403g/cm3 and a flash point of 164.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 13626-59-0
Jingsj CID: J-1523796-4
Molecular Formula: C₅H₅NO₄
Molecular Weight: 143.09700 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	348.6ºC at 760mmHg
Density	1.403g/cm3
Flash Point	164.6ºC
Exact Mass	143.02200
PSA	72.56000
LogP	0.38140
Vapor Pressure	1.87E-05mmHg at 25°C
Refractive Index	1.505

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-Methoxyisoxazole-5-carboxylic acid?

The CAS number of 3-Methoxyisoxazole-5-carboxylic acid is 13626-59-0.

What are the molecular formula and molecular weight of 3-Methoxyisoxazole-5-carboxylic acid?

3-Methoxyisoxazole-5-carboxylic acid has molecular formula C5H5NO4 and molecular weight 143.09700 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. "3-Methoxyisoxazole-5-carboxylic acid (CAS 13626-59-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523796-4 (accessed 2026-11-09).

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