The ingredient, explained

Alpha-isomethyl Ionone

Alpha-Isomethyl Ionone has published research relevant to the stated experimental context.

PerfumingSkin conditioning

Explore connections

Ingredient guide

What it is and what it does

3-Methyl-4--2‚6,6-trimethyl-2-cyclohexenyl--3-buten-2-one

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Perfuming: A formulation role for perfume and aromatic raw materials that give a product its scent.
Skin conditioning: A broad cosmetic role for maintaining skin condition. It does not identify a particular clinical benefit.

Function definitions: Danish Environmental Protection Agency: Cosmetic fragrance functions ↗ · European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Human safety research

Patch testing of people with suspected cosmetic contact dermatitis found positive responses to alpha-isomethyl-ionone and other specific fragrances.

What this does not tell us

Selected patients with suspected dermatitis, not the general cosmetic-using population. Sample size and concentration are not in the reviewed abstract, so no prevalence estimate is assigned.

Sources for this summary. PubMed 16364118 ↗

Research review checked Oct 1, 2026

Selective exact-identity review of 0 supplied local candidates and the targeted primary-source search recorded below. Bounded review, not a systematic search.