2-Methyl-1,2-dihydro-3H-pyrazol-3-one

2-甲基-3(2H)-吡唑酮

Also known as: 2-Methyl-1H-pyrazol-3(2H)-one, 1-Methyl-3-pyrazolin-5-one, 2-Methyl-1,2-dihydro-pyrazol-3-one, 3H-Pyrazol-3-one, 1,2-dihydro-2-methyl-, 1,2-Dihydro-2-methyl-3H-pyrazol-3-one, 1-Methyl-pyrazol-5-on, 1-Methyl-pyrazolon, 2-methyl-1,2-dihydropyrazol-3-one

2-Methyl-1,2-dihydro-3H-pyrazol-3-one (CAS 3310-35-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H6N2O and a molecular weight of 98.10320 g/mol. It is also known as 2-Methyl-1H-pyrazol-3(2H)-one, 1-Methyl-3-pyrazolin-5-one and 2-Methyl-1,2-dihydro-pyrazol-3-one. Key property: a boiling point of 142.0±23.0°C at 760 mmHg. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
3310-35-8
Jingsj CID
J-1440548-6
Molecular Formula
C4H6N2O
Chinese Name
2-甲基-3(2H)-吡唑酮
Molecular Weight
98.10320 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point142.0±23.0°C at 760 mmHg

Frequently Asked Questions

What is the CAS number of 2-Methyl-1,2-dihydro-3H-pyrazol-3-one?

The CAS number of 2-Methyl-1,2-dihydro-3H-pyrazol-3-one is 3310-35-8.

What are the molecular formula and molecular weight of 2-Methyl-1,2-dihydro-3H-pyrazol-3-one?

2-Methyl-1,2-dihydro-3H-pyrazol-3-one has molecular formula C4H6N2O and molecular weight 98.10320 g/mol.

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

Last updated:

How to cite: Jingsj. "2-Methyl-1,2-dihydro-3H-pyrazol-3-one (CAS 3310-35-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1440548-6 (accessed 2026-10-25).

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