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3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylic acid

3-氧代-2,3-二氢-1H-吡唑-4-羧酸

Also known as: 1H-Pyrazole-4-carboxylic acid, 2,3-dihydro-3-oxo-, 5-Oxo-4,5-dihydro-1H-pyrazole-4-carboxylic acid, UZVAVNYJJAUYRH-UHFFFAOYSA-N

3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylic acid (CAS 478968-51-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H4N2O3 and a molecular weight of 128.086 g/mol. It is also known as 1H-Pyrazole-4-carboxylic acid, 2,3-dihydro-3-oxo-, 5-Oxo-4,5-dihydro-1H-pyrazole-4-carboxylic acid and UZVAVNYJJAUYRH-UHFFFAOYSA-N. Key properties include a boiling point of 483.8±30.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 246.4±24.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
478968-51-3
Jingsj CID
J-1181969-5
Molecular Formula
C4H4N2O3
Chinese Name
3-氧代-2,3-二氢-1H-吡唑-4-羧酸
Molecular Weight
128.086 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point483.8±30.0 °C at 760 mmHg
Density1.8±0.1 g/cm3
Flash Point246.4±24.6 °C

Frequently Asked Questions

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

The CAS number of 3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylic acid is 478968-51-3.

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

3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylic acid has molecular formula C4H4N2O3 and molecular weight 128.086 g/mol.

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

Last updated:

How to cite: Jingsj. "3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylic acid (CAS 478968-51-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1181969-5 (accessed 2026-10-25).

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