5-methylisoxazole-3,4-dicarboxylic acid

5-甲基-3,4-异噁唑二羧酸

Also known as: 5-methyl-3,4-isoxazoledicarboxylic acid, 3,4-Isoxazoledicarboxylic acid, 5-methyl-, 3,4-Isoxazoledicarboxylicacid,5-methyl-(9CI), 5-Methyl-1,2-oxazole-3,4-dicarboxylic acid, 5-Methyl-isoxazol-3,4-dicarbonsaeure

5-methylisoxazole-3,4-dicarboxylic acid (CAS 198135-45-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H5NO5 and a molecular weight of 171.108 g/mol. It is also known as 5-methyl-3,4-isoxazoledicarboxylic acid, 3,4-Isoxazoledicarboxylic acid, 5-methyl- and 3,4-Isoxazoledicarboxylicacid,5-methyl-(9CI). Key properties include a boiling point of 439.1±45.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 219.4±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 198135-45-4
Jingsj CID: J-1144632-1
Molecular Formula: C₆H₅NO₅
Chinese Name: 5-甲基-3,4-异噁唑二羧酸
Molecular Weight: 171.108 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	439.1±45.0 °C at 760 mmHg
Density	1.6±0.1 g/cm3
Flash Point	219.4±28.7 °C

Frequently Asked Questions

What is the CAS number of 5-methylisoxazole-3,4-dicarboxylic acid?

The CAS number of 5-methylisoxazole-3,4-dicarboxylic acid is 198135-45-4.

What are the molecular formula and molecular weight of 5-methylisoxazole-3,4-dicarboxylic acid?

5-methylisoxazole-3,4-dicarboxylic acid has molecular formula C6H5NO5 and molecular weight 171.108 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "5-methylisoxazole-3,4-dicarboxylic acid (CAS 198135-45-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1144632-1 (accessed 2026-10-26).

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