3-Methylcyclopentane-1,2,4-trione

Also known as: 1,2,4-Cyclopentanetrione, 3-methyl-, 1,4-Cyclopentanetrione, 3-methyl, 1-Methylcyclopentane-2,3,5-trione, 2-Methyl-1,3,4-trioxocyclopentane, 2-Methyl-cyclopentantrion-(1.3.4), 2-Methyl-cyclopentantrion-(1.3.5), 3-Methyl-1,2,4-cyclopentanetrione, 3-Methyl-1,4-cyclopentanetrione, 3-Methyl-1.2.4-trioxo-cyclopentan, 3-Methyl-cyclopentan-1,2,4-trion, 3-Methyl-cyclopentantrion-(1.2.4), 3-methyl-cyclopentane-1,2,4-trione, 3-methylcyclopentane-1,2,4-trione, 5-Methylcyclopentane-1,2,4-trione

3-Methylcyclopentane-1,2,4-trione (CAS 4505-54-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6H6O3 and a molecular weight of 126.11000 g/mol. Key properties include a boiling point of 256.9ºC at 760 mmHg, a density of 1.284g/cm3 and a flash point of 105.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4505-54-8
Jingsj CID: J-1593567-8
Molecular Formula: C₆H₆O₃
Molecular Weight: 126.11000 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	256.9ºC at 760 mmHg
Density	1.284g/cm3
Flash Point	105.5ºC
Exact Mass	126.03200
PSA	51.21000
Refractive Index	1.485

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-Methylcyclopentane-1,2,4-trione?

The CAS number of 3-Methylcyclopentane-1,2,4-trione is 4505-54-8.

What are the molecular formula and molecular weight of 3-Methylcyclopentane-1,2,4-trione?

3-Methylcyclopentane-1,2,4-trione has molecular formula C6H6O3 and molecular weight 126.11000 g/mol.

What are the upstream and downstream products of 3-Methylcyclopentane-1,2,4-trione?

For 3-Methylcyclopentane-1,2,4-trione, Upstream Products: ethyl 2-(3-methyl-2,4,5-trioxocyclopentyl)-2-oxoacetate, Diethyl oxalate, Phosphoric acid; Downstream Products: 2-Methyl-1,3-cyclopentanedione.

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-Methylcyclopentane-1,2,4-trione (CAS 4505-54-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1593567-8 (accessed 2026-11-09).

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