Fragrance avoidance
Not a strong fit for fragrance avoidance because it carries Fragrance.
The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.
CAS 127-51-5
Concern score
Also known as 3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one
Used in cosmetics as a skin-conditioning agent and a fragrance ingredient.
Canonical ingredient record built from 2 public-source records.
No restrictions found. Alpha-isomethyl ionone appears in these published regulatory listings.
No expert opinion on file for Alpha-isomethyl ionone. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
No graded research studies for Alpha-isomethyl ionone yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
CosIng
regulatory · updated 2026-09-23
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Fragrance avoidance
Not a strong fit for fragrance avoidance because it carries Fragrance.
The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.
Their ingredient lists include Alpha-isomethyl ionone; each product's own rating depends on its whole formula, so it is shown on the product page, not here.
Ingredients that frequently appear alongside Alpha-isomethyl ionone in the catalog.