1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one

Also known as: 2,3-Dimethyl-5-pyrazolone, 1,5-Dimethyl-1,2-dihydro-3-pyrazolone, 1,5-Dimethyl-3-hydroxypyrazole, 1,5-Dimethyl-1H-pyrazol-3(2H)-one, 1,5-dimethyl-1,2-dihydro-pyrazol-3-one, 1,5-dimethyl-2,3-dihydro-1H-pyrazol-3-one, 2,3-Dimethyl-3-pyrazolin-5-one, 2,3-Dimethyl-pyrazolin-5-on, 3H-Pyrazol-3-one, 1,2-dihydro-1,5-dimethyl-, 1,5-dimethylpyrazolin-3-one

1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one (CAS 3201-28-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H8N2O and a molecular weight of 112.13000 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3201-28-3
Jingsj CID: J-1348029-0
Molecular Formula: C₅H₈N₂O
Molecular Weight: 112.13000 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Exact Mass	112.06400
PSA	37.79000
LogP	0.02180

Customs & Trade Information

HS Code	2933199090
Summary	2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one?

The CAS number of 1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one is 3201-28-3.

What are the molecular formula and molecular weight of 1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one?

1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one has molecular formula C5H8N2O and molecular weight 112.13000 g/mol.

What are the upstream and downstream products of 1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one?

For 1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one, Upstream Products: 3-Methyl-5-pyrazolone, Methyl p-toluenesulfonate, iodomethane.

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

Last updated: 8/21/2026

How to cite: Jingsj. "1,5-Dimethyl-2,3-dihydro-1H-pyrazol-3-one (CAS 3201-28-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1348029-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.