2-Allyl-2-methyl-1,3-cyclopentanedione

2-烯丙基-2-甲基-1,3-环戊二酮

Also known as: 1,3-Cyclopentanedione, 2-methyl-2-(2-propen-1-yl)-, 2-allyl-2-methylcyclopentane-1,3-dione, 2-methyl-2-prop-2-enylcyclopentane-1,3-dione, NSC 380474

2-Allyl-2-methyl-1,3-cyclopentanedione (CAS 26828-48-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H12O2 and a molecular weight of 152.19000 g/mol. It is also known as 1,3-Cyclopentanedione, 2-methyl-2-(2-propen-1-yl)-, 2-allyl-2-methylcyclopentane-1,3-dione and 2-methyl-2-prop-2-enylcyclopentane-1,3-dione. Key properties include a boiling point of 228.4ºC at 760mmHg, a density of 1.019g/cm3 and a flash point of 95.6ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
26828-48-8
Jingsj CID
J-30883-2
Molecular Formula
C9H12O2
Chinese Name
2-烯丙基-2-甲基-1,3-环戊二酮
Molecular Weight
152.19000 g/mol
Category
Ketones
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point228.4ºC at 760mmHg
Density1.019g/cm3
Flash Point95.6ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 2-Allyl-2-methyl-1,3-cyclopentanedione?

The CAS number of 2-Allyl-2-methyl-1,3-cyclopentanedione is 26828-48-8.

What are the molecular formula and molecular weight of 2-Allyl-2-methyl-1,3-cyclopentanedione?

2-Allyl-2-methyl-1,3-cyclopentanedione has molecular formula C9H12O2 and molecular weight 152.19000 g/mol.

Is 2-Allyl-2-methyl-1,3-cyclopentanedione hazardous?

2-Allyl-2-methyl-1,3-cyclopentanedione has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "2-Allyl-2-methyl-1,3-cyclopentanedione (CAS 26828-48-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30883-2 (accessed 2026-10-23).

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