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ALPHA-METHYL-BETA-IONONE.

Questionable CAS 127-43-5 / PERFUMING

Alpha-Methyl-Beta-Ionone is an aromatic compound recognized for its pleasant floral-woody scent, often described as reminiscent of violet or iris. In skincare formulations, it serves both as a perfuming agent and contributes to skin conditioning.

perfuming skin conditioning

Science

This ingredient primarily functions by imparting a distinct floral-woody aroma, thereby enhancing the sensory experience of a product. It is also noted for its ability to help maintain the skin in good condition, acting as a conditioning agent.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Alpha-Methyl-Beta-Ionone is generally stable, with a reported shelf life of 24 months or longer under proper storage conditions.

Conflicts

  • strong Lewis or mineral acids
  • halogens
  • free radical initiators
  • oxidizing agents

Safety

CIR Status
Not reviewed
Max tested
7.6%
Sensitization risk Moderate

Alpha-Methyl-Beta-Ionone, also referred to as Alpha-Isomethyl Ionone, is classified among the EU 26 fragrance allergens and must be declared on product labels due to its potential for sensitization. While the RIFM Expert Panel concluded methyl ionone (inclusive of Alpha-Methyl-Beta-Ionone) is safe within their safety assessment, noting it is not genotoxic or phototoxic/photoallergenic and exhibits a low skin sensitization profile (NESIL of 70,000 µg/cm²), individuals with known allergies to fragrance components should exercise caution. The maximum recommended concentration in leave-on face moisturizers (IFRA Category 5B) is 7.60%.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Medium
Comedogenicity Unknown

Our Assessment

Questionable

Primarily a perfuming agent with some skin conditioning properties, Alpha-Methyl-Beta-Ionone carries a moderate sensitization risk for susceptible individuals due to its classification as an EU fragrance allergen.


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