Ethyl 1H-pyrazole-3-carboxylate

Also known as: Ethyl 1H-pyrazole-5-carboxylate, 3-Carbethoxypyrazole, Ethyl pyrazole-3-carboxylate, 1H-Pyrazole-3-carboxylic acid ethyl ester, ethyl 1H-pyrazole-5(3)-carboxylate

Ethyl 1H-pyrazole-3-carboxylate (CAS 21056-77-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H8N2O2 and a molecular weight of 140.140 g/mol. Key properties include a boiling point of 279.2±13.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 122.7±19.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21056-77-9
Jingsj CID: J-1085889-6
Molecular Formula: C₆H₈N₂O₂
Molecular Weight: 140.140 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	279.2±13.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	122.7±19.8 °C
Exact Mass	140.058578
PSA	54.98000
LogP	0.63
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.522

Frequently Asked Questions

What is the CAS number of Ethyl 1H-pyrazole-3-carboxylate?

The CAS number of Ethyl 1H-pyrazole-3-carboxylate is 21056-77-9.

What are the molecular formula and molecular weight of Ethyl 1H-pyrazole-3-carboxylate?

Ethyl 1H-pyrazole-3-carboxylate has molecular formula C6H8N2O2 and molecular weight 140.140 g/mol.

What are the upstream and downstream products of Ethyl 1H-pyrazole-3-carboxylate?

For Ethyl 1H-pyrazole-3-carboxylate, Upstream Products: Ethanol, 1H-Pyrazole-3-carboxylic acid, Ethyl pyruvate.

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. "Ethyl 1H-pyrazole-3-carboxylate (CAS 21056-77-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1085889-6 (accessed 2026-11-09).

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