5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid

5-氧代-2,5-二氢-1H-1,2,4-三唑-3-羧酸

Also known as: 5-oxo-1,2-dihydro-1,2,4-triazole-3-carboxylic acid, 5-hydroxy-1H-1,2,4-triazole-3-carboxylic acid, 5-oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid, 1H-1,2,4-triazole-3-carboxylic acid, 2,5-dihydro-5-oxo-, 1,2,4-triazo-5-on-3-carbonsaeure

5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid (CAS 4538-16-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H3N3O3 and a molecular weight of 129.07400 g/mol. It is also known as 5-oxo-1,2-dihydro-1,2,4-triazole-3-carboxylic acid, 5-hydroxy-1H-1,2,4-triazole-3-carboxylic acid and 5-oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4538-16-3
Jingsj CID: J-1573968-9
Molecular Formula: C₃H₃N₃O₃
Chinese Name: 5-氧代-2,5-二氢-1H-1,2,4-三唑-3-羧酸
Molecular Weight: 129.07400 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of 5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid?

The CAS number of 5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid is 4538-16-3.

What are the molecular formula and molecular weight of 5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid?

5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid has molecular formula C3H3N3O3 and molecular weight 129.07400 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-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic acid (CAS 4538-16-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1573968-9 (accessed 2026-10-24).

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