3-(tert-Butyl)cyclopentanone

Also known as: 3-(tert-Butyl)cyclopentan-1-one, 3-tert-butylcyclopentan-1-one, 3-tert-butylcyclopentanone, Cyclopentanone, 3-(1,1-dimethylethyl)-

3-(tert-Butyl)cyclopentanone (CAS 5581-94-2) 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 192.9ºC at 760mmHg, a density of 0.925g/cm3 and a flash point of 63.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5581-94-2
Jingsj CID: J-1017188-7
Molecular Formula: C₉H₁₆O
Molecular Weight: 140.22300 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	192.9ºC at 760mmHg
Density	0.925g/cm3
Flash Point	63.4ºC
Exact Mass	140.12000
PSA	17.07000
LogP	2.40170
Refractive Index	1.458

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 3-(tert-Butyl)cyclopentanone?

The CAS number of 3-(tert-Butyl)cyclopentanone is 5581-94-2.

What are the molecular formula and molecular weight of 3-(tert-Butyl)cyclopentanone?

3-(tert-Butyl)cyclopentanone has molecular formula C9H16O and molecular weight 140.22300 g/mol.

What are the upstream and downstream products of 3-(tert-Butyl)cyclopentanone?

For 3-(tert-Butyl)cyclopentanone, Upstream Products: 3-tert-Butyladipic acid, 2-Cyclopenten-1-one, Diiodomethane; Downstream Products: 1-Bromopinacolone.

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. "3-(tert-Butyl)cyclopentanone (CAS 5581-94-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1017188-7 (accessed 2026-11-09).

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