fragrance

Alpha-Isomethyl Ionone

INCI: ALPHA-ISOMETHYL IONONE
CAS 127-51-5 EC 204-846-3
3-Methyl-4-(2,6,6-trimethyl-2-cyclohexenyl)-3-buten-2-one; Methyl-gamma-ionone; gamma-Methylionone
Limited Data
Insufficient safety data available. Consider enriching this ingredient.
Details

Description

3-Methyl-4-(2,6,6-trimethyl-2-cyclohexenyl)-3-buten-2-one; Methyl-gamma-ionone; gamma-Methylionone

Purpose

Function

Fragrance ingredient
Profile

Properties

Silicone
Silicone free
Compliance

Regulatory Status

EU
Permitted
Safety
GOOD
US
Permitted
Absorptionmoderate
Sensitizationlow
MoSnot established
NOAEL150 mg/kg
ConcernLow
Flags
eu_children_restrictedifra_fragrancefda_food_additiveeu_cosing_listed
Verdict

Good safety profile. Generally considered safe for cosmetic use.

Assessment

Ratings

Comedogenic0/5
LowHigh
Irritancy0/5
LowHigh
Reference

Identifiers

CAS Number
127-51-5
EC Number
204-846-3
INCI
ALPHA-ISOMETHYL IONONE
Category
fragrance
Updated
Apr 2, 2026