6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one

6,7-二氢-2,3-二甲基-1H,5H-吡唑并[1,2-a]吡唑-1-酮

Also known as: 1H,5H-Pyrazolo[1,2-a]pyrazol-1-one, 6,7-dihydro-2,3-dimethyl-, 1,2-Trimethylene-3,4-dimethylpyrazolone-5, 1H,5H-Pyrazolo(1,2-a)pyrazol-1-one,6,7-dihydro-2,3-dimethyl, 6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo(1,2-a)pyrazol-1-one

6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one (CAS 51938-03-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H12N2O and a molecular weight of 152.19400 g/mol. It is also known as 1H,5H-Pyrazolo[1,2-a]pyrazol-1-one, 6,7-dihydro-2,3-dimethyl-, 1,2-Trimethylene-3,4-dimethylpyrazolone-5 and 1H,5H-Pyrazolo(1,2-a)pyrazol-1-one,6,7-dihydro-2,3-dimethyl. Key properties include a boiling point of 222.3ºC at 760mmHg, a density of 1.19g/cm3 and a flash point of 87.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
51938-03-5
Jingsj CID
J-1399141-8
Molecular Formula
C8H12N2O
Chinese Name
6,7-二氢-2,3-二甲基-1H,5H-吡唑并[1,2-a]吡唑-1-酮
Molecular Weight
152.19400 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point222.3ºC at 760mmHg
Density1.19g/cm3
Flash Point87.3ºC

Frequently Asked Questions

What is the CAS number of 6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one?

The CAS number of 6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one is 51938-03-5.

What are the molecular formula and molecular weight of 6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one?

6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one has molecular formula C8H12N2O and molecular weight 152.19400 g/mol.

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

Last updated:

How to cite: Jingsj. "6,7-Dihydro-2,3-dimethyl-1H,5H-pyrazolo[1,2-a]pyrazol-1-one (CAS 51938-03-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1399141-8 (accessed 2026-10-25).

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