3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one

3-乙基-2-羟基-4-甲基环戊-2-烯-1-酮

Also known as: 4-Methyl-3-ethylcyclopentane-1,2-dione, 3-Ethyl-4-methylcyclotene, 3-Ethyl-2-hydroxy-4-methyl-2-cyclopenten-1-one, 2-Hydroxy-3-ethyl-4-methyl-2-cyclopentene-1-one, 3-Ethyl-2-hydroxy-4-methylcyclopent-2-enone

3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one (CAS 42348-12-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H12O2 and a molecular weight of 140.18000 g/mol. It is also known as 4-Methyl-3-ethylcyclopentane-1,2-dione, 3-Ethyl-4-methylcyclotene and 3-Ethyl-2-hydroxy-4-methyl-2-cyclopenten-1-one. Key properties include a boiling point of 260.5ºC at 760 mmHg, a density of 1.086 g/cm3 and a flash point of 108ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 42348-12-9
Jingsj CID: J-42236-7
Molecular Formula: C₈H₁₂O₂
Chinese Name: 3-乙基-2-羟基-4-甲基环戊-2-烯-1-酮
Molecular Weight: 140.18000 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	260.5ºC at 760 mmHg
Density	1.086 g/cm3
Flash Point	108ºC

Frequently Asked Questions

What is the CAS number of 3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one?

The CAS number of 3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one is 42348-12-9.

What are the molecular formula and molecular weight of 3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one?

3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one has molecular formula C8H12O2 and molecular weight 140.18000 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one (CAS 42348-12-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42236-7 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.