5-Ethyl-3-methylcyclohex-2-enone

Also known as: 3-Methyl-5-ethyl-2-cyclohexen-1-one, 2-Cyclohexen-1-one, 5-ethyl-3-methyl-, 3-Methyl-5-ethylcyclohex-2-en-1-one, 5-Ethyl-3-methylcyclohex-2-en-1-one, 5-Ethyl-3-methyl-2-cyclohexenone, 5-ethyl-3-methyl-cyclohex-2-enone

5-Ethyl-3-methylcyclohex-2-enone (CAS 40920-68-1) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H14O and a molecular weight of 138.20700 g/mol. Key properties include a boiling point of 212ºC, a density of 0.91 and a flash point of 84ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 40920-68-1
Jingsj CID: J-1107221-2
Molecular Formula: C₉H₁₄O
Molecular Weight: 138.20700 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	212ºC
Density	0.91
Flash Point	84ºC
Exact Mass	138.10400
PSA	17.07000
LogP	2.32180
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 5-Ethyl-3-methylcyclohex-2-enone?

The CAS number of 5-Ethyl-3-methylcyclohex-2-enone is 40920-68-1.

What are the molecular formula and molecular weight of 5-Ethyl-3-methylcyclohex-2-enone?

5-Ethyl-3-methylcyclohex-2-enone has molecular formula C9H14O and molecular weight 138.20700 g/mol.

What are the upstream and downstream products of 5-Ethyl-3-methylcyclohex-2-enone?

For 5-Ethyl-3-methylcyclohex-2-enone, Upstream Products: Ethyl acetoacetate, Propionaldehyde, ethyl 6-ethyl-2-methyl-4-oxocyclohex-2-ene-1-carboxylate; Downstream Products: 3-Ethyl-5-methylphenol.

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. "5-Ethyl-3-methylcyclohex-2-enone (CAS 40920-68-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1107221-2 (accessed 2026-11-09).

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