4-Ethynyl-1H-pyrazole
4-吡唑-乙炔
Also known as: 4-ethynylpyrazole, 1H-Pyrazole, 4-ethynyl-, 1H-Pyrazole,4-ethynyl, 4-Ethinylpyrazol, 4-Ethynyl-1H-pyrazole,95+
4-Ethynyl-1H-pyrazole (CAS 57121-49-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H4N2 and a molecular weight of 92.099 g/mol. It is also known as 4-ethynylpyrazole, 1H-Pyrazole, 4-ethynyl- and 1H-Pyrazole,4-ethynyl. Key properties include a boiling point of 238.5±13.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 114.3±12.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 57121-49-0
- Jingsj CID
- J-873413-6
- Molecular Formula
- C5H4N2
- Chinese Name
- 4-吡唑-乙炔
- Molecular Weight
- 92.099 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 238.5±13.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 114.3±12.8 °C |
Frequently Asked Questions
What is the CAS number of 4-Ethynyl-1H-pyrazole?
The CAS number of 4-Ethynyl-1H-pyrazole is 57121-49-0.
What are the molecular formula and molecular weight of 4-Ethynyl-1H-pyrazole?
4-Ethynyl-1H-pyrazole has molecular formula C5H4N2 and molecular weight 92.099 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Ethynyl-1H-pyrazole (CAS 57121-49-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-873413-6 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.