4,4-Dimethyl-1-phenyl-3-pyrazolidone

Also known as: 4,4-Dimethyl-1-phenylpyrazolidin-3-one, Dimezone, Phenidone D, 4,4-Dimethylphenidone, 1-Phenyl-4,4-dimethyl-3-pyrazolidinone, 1-Phenyl-4,4-dimethylpyrazolidine-3-one, NSC 215239

4,4-Dimethyl-1-phenyl-3-pyrazolidone (CAS 2654-58-2) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H14N2O and a molecular weight of 190.242 g/mol. Key properties include a melting point of 167-172 °C(lit.), a density of 1.1±0.1 g/cm3 and a flash point of 195 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2654-58-2
Jingsj CID: J-49520-5
Molecular Formula: C₁₁H₁₄N₂O
Molecular Weight: 190.242 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	167-172 °C(lit.)
Density	1.1±0.1 g/cm3
Flash Point	195 °C
Exact Mass	190.110611
PSA	32.34000
LogP	1.22
Refractive Index	1.537
Additional Property	soluble

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 4,4-Dimethyl-1-phenyl-3-pyrazolidone?

The CAS number of 4,4-Dimethyl-1-phenyl-3-pyrazolidone is 2654-58-2.

What are the molecular formula and molecular weight of 4,4-Dimethyl-1-phenyl-3-pyrazolidone?

4,4-Dimethyl-1-phenyl-3-pyrazolidone has molecular formula C11H14N2O and molecular weight 190.242 g/mol.

What are the upstream and downstream products of 4,4-Dimethyl-1-phenyl-3-pyrazolidone?

For 4,4-Dimethyl-1-phenyl-3-pyrazolidone, Upstream Products: 3-Chloropivaloyl chloride, Phenylhydrazine.

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. "4,4-Dimethyl-1-phenyl-3-pyrazolidone (CAS 2654-58-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49520-5 (accessed 2026-11-09).

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