2,3,4,5-Tetramethyl-2-cyclopenten-1-one

Also known as: 2,3,4,5-Tetramethylcyclopent-2-en-1-one, 2,3,4,5-Tetramethyl-2-cyclopentenone, 2,3,4,5-Tetramethylcyclopent-2-enone, 2-Cyclopenten-1-one, 2,3,4,5-tetramethyl-

2,3,4,5-Tetramethyl-2-cyclopenten-1-one (CAS 54458-61-6) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H14O and a molecular weight of 138.207 g/mol. Key properties include a boiling point of 196.1±10.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 73.3±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 54458-61-6
Jingsj CID: J-7573-0
Molecular Formula: C₉H₁₄O
Molecular Weight: 138.207 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	196.1±10.0 °C at 760 mmHg
Density	0.9±0.1 g/cm3
Flash Point	73.3±0.0 °C
Exact Mass	138.104462
PSA	17.07000
LogP	2.11
Vapor Pressure	0.4±0.4 mmHg at 25°C
Refractive Index	1.451

Customs & Trade Information

HS Code	2914299000
Summary	2914299000. other cyclanic, cyclenic or cyclotherpenic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2,3,4,5-Tetramethyl-2-cyclopenten-1-one?

The CAS number of 2,3,4,5-Tetramethyl-2-cyclopenten-1-one is 54458-61-6.

What are the molecular formula and molecular weight of 2,3,4,5-Tetramethyl-2-cyclopenten-1-one?

2,3,4,5-Tetramethyl-2-cyclopenten-1-one has molecular formula C9H14O and molecular weight 138.207 g/mol.

What are the upstream and downstream products of 2,3,4,5-Tetramethyl-2-cyclopenten-1-one?

For 2,3,4,5-Tetramethyl-2-cyclopenten-1-one, Upstream Products: tetrahydro-2,3,5,6-tetramethyl-4H-pyran-4-one, ch3cho, 3-Pentanone; Downstream Products: Pentamethylcyclopentadiene, tetramethyl(n-propyl)cyclopentadiene, Trimethyl(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silane.

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. "2,3,4,5-Tetramethyl-2-cyclopenten-1-one (CAS 54458-61-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-7573-0 (accessed 2026-11-09).

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