2,2,5,5-tetramethylcyclopentan-1-one

Also known as: 2,2,5,5-TETRAMETHYLCYCLOPENTANONE, 2,2,5,5-Tetramethyl-cyclopentanon, 2,2,5,5-tetramethyl-cyclopentanone, Cyclopentanone, 2,2,5,5-tetramethyl-, Cyclopentanone,2,2,5,5-tetramethyl

2,2,5,5-tetramethylcyclopentan-1-one (CAS 4541-35-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H16O and a molecular weight of 140.22300 g/mol. Key properties include a boiling point of 172.1ºC at 760 mmHg, a density of 0.865g/cm3 and a flash point of 51ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4541-35-9
Jingsj CID: J-1103991-1
Molecular Formula: C₉H₁₆O
Molecular Weight: 140.22300 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	172.1ºC at 760 mmHg
Density	0.865g/cm3
Flash Point	51ºC
Exact Mass	140.12000
PSA	17.07000
LogP	2.40170
Refractive Index	1.429

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 2,2,5,5-tetramethylcyclopentan-1-one?

The CAS number of 2,2,5,5-tetramethylcyclopentan-1-one is 4541-35-9.

What are the molecular formula and molecular weight of 2,2,5,5-tetramethylcyclopentan-1-one?

2,2,5,5-tetramethylcyclopentan-1-one has molecular formula C9H16O and molecular weight 140.22300 g/mol.

What are the upstream and downstream products of 2,2,5,5-tetramethylcyclopentan-1-one?

For 2,2,5,5-tetramethylcyclopentan-1-one, Upstream Products: Cyclopentanone, iodomethane, Dimethyl sulfate; Downstream Products: 2,2,5-Trimethylhex-4-enal, 1,1,3,3-tetramethylcyclopentane.

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. "2,2,5,5-tetramethylcyclopentan-1-one (CAS 4541-35-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1103991-1 (accessed 2026-11-09).

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