The ingredient, explained
Ionone
Ionone; -E--4--2‚6,6-trimethyl-1-cyclohexen-1-yl--3-buten-2-one
Ingredient guide
What it is and what it does
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Astringent
- A technical role associated with tightening the skin surface.
- Perfuming
- A formulation role for perfume and aromatic raw materials that give a product its scent.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗ · Danish Environmental Protection Agency: Cosmetic fragrance functions ↗
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
We have not yet published a checked study for this exact ingredient. This is a gap in our coverage, not a finding that research does not exist or that the ingredient is ineffective.
Ingredient research is not proof that a product containing this ingredient works.
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
- INCI name on ingredient lists
- IONONE
- CAS registry number
- 8013-90-9, 79-77-6
- EC number
- 232-396-8 / 201-224-3
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026