5-(5-bromothiophen-2-yl)-1H-pyrazole

5-(5-溴噻吩-2-基)-1H-吡唑

Also known as: 3-(5-bromothiophen-2-yl)-1H-pyrazole, 2-Bromo-5-(1H-pyrazol-3-yl)thiophene, 2-Bromo-5-(1H-pyrazol-5-yl)thiophene, 3-(5-Bromo-2-thienyl)-1H-pyrazole, 3-(5-Bromo-2-thienyl)pyrazole, 3-(5-Bromothien-2-yl)-1H-pyrazole, 5-(5-Bromo-2-thienyl)-1H-pyrazole, 5-(5-Bromothien-2-yl)-1H-pyrazole, bromothienylpyrazole

5-(5-bromothiophen-2-yl)-1H-pyrazole (CAS 166196-67-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5BrN2S and a molecular weight of 229.09700 g/mol. It is also known as 3-(5-bromothiophen-2-yl)-1H-pyrazole, 2-Bromo-5-(1H-pyrazol-3-yl)thiophene and 2-Bromo-5-(1H-pyrazol-5-yl)thiophene. Key properties include a melting point of 167-168ºC, a boiling point of 369.3ºC at 760 mmHg, a density of 1.736g/cm3 and a flash point of 177.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
166196-67-4
Jingsj CID
J-1102189-2
Molecular Formula
C7H5BrN2S
Chinese Name
5-(5-溴噻吩-2-基)-1H-吡唑
Molecular Weight
229.09700 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point167-168ºC
Boiling Point369.3ºC at 760 mmHg
Density1.736g/cm3
Flash Point177.1ºC

Frequently Asked Questions

What is the CAS number of 5-(5-bromothiophen-2-yl)-1H-pyrazole?

The CAS number of 5-(5-bromothiophen-2-yl)-1H-pyrazole is 166196-67-4.

What are the molecular formula and molecular weight of 5-(5-bromothiophen-2-yl)-1H-pyrazole?

5-(5-bromothiophen-2-yl)-1H-pyrazole has molecular formula C7H5BrN2S and molecular weight 229.09700 g/mol.

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

Last updated:

How to cite: Jingsj. "5-(5-bromothiophen-2-yl)-1H-pyrazole (CAS 166196-67-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1102189-2 (accessed 2026-10-23).

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