1-(4-methylphenyl)butane-1,3-dione

Also known as: 1-p-Tolylbutane-1,3-dione, 4-Methylbenzoylacetone, p-Methylbenzoylacetone, 1,3-Butanedione, 1-(4-methylphenyl)-, 1-(4-methylphenyl)-1,3-butanedione, 1-(p-tolyl)butane-1,3-dione, 1-p-tolyl-butane-1,3-dione, 1-p-Toylbutane-1,3-dione, (E)-1-(4-methylphenyl)-3-oxobut-1-en-1-olate, (E)-1-(4-methylphenyl)-3-oxo-1-buten-1-olate, 1-(4-methylphenyl)butan-1,3-dione

1-(4-methylphenyl)butane-1,3-dione (CAS 4023-79-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H12O2 and a molecular weight of 176.212 g/mol. Key properties include a boiling point of 287.1±15.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 106.9±17.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4023-79-4
Jingsj CID: J-1454424-2
Molecular Formula: C₁₁H₁₂O₂
Molecular Weight: 176.212 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	287.1±15.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	106.9±17.4 °C
Exact Mass	176.083725
PSA	34.14000
LogP	2.98
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.514

Customs & Trade Information

HS Code	2914399090
Summary	2914399090. other aromatic 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 1-(4-methylphenyl)butane-1,3-dione?

The CAS number of 1-(4-methylphenyl)butane-1,3-dione is 4023-79-4.

What are the molecular formula and molecular weight of 1-(4-methylphenyl)butane-1,3-dione?

1-(4-methylphenyl)butane-1,3-dione has molecular formula C11H12O2 and molecular weight 176.212 g/mol.

What are the upstream and downstream products of 1-(4-methylphenyl)butane-1,3-dione?

For 1-(4-methylphenyl)butane-1,3-dione, Upstream Products: Ethyl acetate, 4'-Methylacetophenone, 4-Methylbenzoyl chloride; Downstream Products: 5-Methyl-3-(4-methylphenyl)-1H-pyrazole, 4-Methylbenzoic acid.

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. "1-(4-methylphenyl)butane-1,3-dione (CAS 4023-79-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1454424-2 (accessed 2026-11-09).

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