1-[4-(2-Methylpropyl)phenyl]ethanone

4-异丁基苯乙酮

Also known as: 4'-(2-Methylpropyl)acetophenone, 4-Isobutylacetophenone, 1-(4-Isobutylphenyl)ethanone, 4'-Isobutylacetophenone, p-Isobutylacetophenone, p-iso-Butylacetophenone, Ibuprofen Impurity E, Ibuprofen Related Compound C, MFCD00027393

1-[4-(2-Methylpropyl)phenyl]ethanone (CAS 38861-78-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C12H16O and a molecular weight of 176.255 g/mol. It is also known as 4'-(2-Methylpropyl)acetophenone, 4-Isobutylacetophenone and 1-(4-Isobutylphenyl)ethanone. Key properties include a melting point of 134-135ºC 16mm, a boiling point of 268.8±19.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 108.4±16.5 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 38861-78-8
Jingsj CID: J-10217-1
Molecular Formula: C₁₂H₁₆O
Chinese Name: 4-异丁基苯乙酮
Molecular Weight: 176.255 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	134-135ºC 16mm
Boiling Point	268.8±19.0 °C at 760 mmHg
Density	0.9±0.1 g/cm3
Flash Point	108.4±16.5 °C

GHS Safety & Compliance

Flammable / Irritant / Environmental HazardSignal word: Warning

Frequently Asked Questions

What is the CAS number of 1-[4-(2-Methylpropyl)phenyl]ethanone?

The CAS number of 1-[4-(2-Methylpropyl)phenyl]ethanone is 38861-78-8.

What are the molecular formula and molecular weight of 1-[4-(2-Methylpropyl)phenyl]ethanone?

1-[4-(2-Methylpropyl)phenyl]ethanone has molecular formula C12H16O and molecular weight 176.255 g/mol.

Is 1-[4-(2-Methylpropyl)phenyl]ethanone hazardous?

1-[4-(2-Methylpropyl)phenyl]ethanone has GHS signal word Warning.

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

Last updated: 8/21/2026

How to cite: Jingsj. "1-[4-(2-Methylpropyl)phenyl]ethanone (CAS 38861-78-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-10217-1 (accessed 2026-10-22).

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