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Moumoujus

ALPHA-METHYL-ALPHA-IONONE.

Avoid CAS 127-42-4 / PERFUMING

Alpha-Methyl-Alpha-Ionone is a synthetic fragrance compound primarily utilized for its distinct floral, powdery, and violet-like aroma, often evoking violets. It also serves as a fragrance fixative, extending the longevity of other scent components within cosmetic formulations. While enhancing the sensory experience, it offers no direct beneficial effects for skin health or function.

Summary

perfuming

Science

Mechanism of Action

This compound primarily operates as an olfactive agent, imparting a desired scent profile to cosmetic products. Its mechanism involves interaction with olfactory receptors to create a sensory experience. It does not confer any direct skincare benefits such as hydration, anti-aging effects, or enhancement of the skin barrier.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Commonly dusted
Min. effective
0.001%
Red flag below
0.001%

As an ingredient included solely for fragrance, with no direct skincare benefits, and recognized as a potential allergen requiring specific labeling above 0.001% in leave-on products (EU), Alpha-Methyl-Alpha-Ionone can be considered 'dusted' in precision skincare formulations.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Exhibits superior stability compared to many natural fragrance compounds, contributing to consistent product scent over time. For optimal shelf life, it should be stored in tightly sealed containers in a cool, dry environment, protected from direct heat and light. It is recommended to incorporate it as a final step in formulation, avoiding temperatures exceeding 40°C.

Conflicts

  • strong bases
  • strong acids
  • sources of ignition
  • direct sunlight
  • extremely high or low temperatures

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
7.6%
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Alpha-Methyl-Alpha-Ionone and considers it safe for use in cosmetics at regulated concentrations. However, it is classified as one of the 'EU 26 fragrances,' mandating separate labeling in the European Union if its concentration surpasses 0.001% in leave-on products and 0.01% in rinse-off products, due to its established potential as an allergen. The International Fragrance Association (IFRA) sets varying maximum use levels across product categories, with a specific limit of 7.60% for leave-on face and body moisturizers. The Research Institute for Fragrance Materials (RIFM) concluded it is a weak skin sensitizer with a No Expected Sensitization Induction Level (NESIL) of 70,000 μg/cm².

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Given its lack of direct skincare benefits and documented potential as a weak skin sensitizer requiring specific labeling, Alpha-Methyl-Alpha-Ionone is generally not recommended for precision skincare formulations aiming to optimize skin health without unnecessary risks.

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