Fragrance

Alpha-Ionone

INCI: ALPHA-IONONE
CAS 127-41-3 EC 204-841-6
4-(2,6,6-Trimethylcyclohex-2-eneyl)-but-3-ene-2-one; 1-(2,6,6-Trimethylcyclohex-2-eneyl)-but-1-ene-3-one.
Limited Data
Insufficient safety data available. Consider enriching this ingredient.
Details

Description

4-(2,6,6-Trimethylcyclohex-2-eneyl)-but-3-ene-2-one; 1-(2,6,6-Trimethylcyclohex-2-eneyl)-but-1-ene-3-one.

Purpose

Function

Fragrance (Perfuming)
Profile

Properties

Silicone
Silicone free
Compliance

Regulatory Status

EU
Permitted
Safety
GOOD
US
Permitted
Absorptionhigh
Sensitizationlow
MoSadequate
NOAEL10 mg/kg
ConcernLow
Flags
fragrance-componentifra_fragrancefda_food_additive
Verdict

DNEL for workers (dermal, long-term, systemic) established in SDS data. Safe under current use conditions per RIFM.

US Note

Not restricted by FDA; RIFM safety-assessed and supported

Assessment

Ratings

Comedogenic0/5
LowHigh
Irritancy0/5
LowHigh
Reference

Identifiers

CAS Number
127-41-3
EC Number
204-841-6
INCI
ALPHA-IONONE
Category
Fragrance
Updated
Apr 2, 2026