1H-Pyrazol-5(4H)-one
二氢吡唑酮
Also known as: 2,4-dihydro-3H-pyrazol-3-one, 2,4-dihydro-pyrazol-3-one, 1,4-dihydropyrazol-5-one, 5-pyrazolone, NSC 243823
1H-Pyrazol-5(4H)-one (CAS 137-44-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C3H4N2O and a molecular weight of 84.07670 g/mol. It is also known as 2,4-dihydro-3H-pyrazol-3-one, 2,4-dihydro-pyrazol-3-one and 1,4-dihydropyrazol-5-one. Key properties include a melting point of 162 °C and a density of 1.44g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 137-44-0
- Jingsj CID
- J-30-3
- Molecular Formula
- C3H4N2O
- Chinese Name
- 二氢吡唑酮
- Molecular Weight
- 84.07670 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 162 °C |
|---|---|
| Density | 1.44g/cm3 |
Frequently Asked Questions
What is the CAS number of 1H-Pyrazol-5(4H)-one?
The CAS number of 1H-Pyrazol-5(4H)-one is 137-44-0.
What are the molecular formula and molecular weight of 1H-Pyrazol-5(4H)-one?
1H-Pyrazol-5(4H)-one has molecular formula C3H4N2O and molecular weight 84.07670 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1H-Pyrazol-5(4H)-one (CAS 137-44-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30-3 (accessed 2026-10-23).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.