Alpha Isomethyl Ionone


Fragrance Synthetic and Natural

No known benefits

Alpha Isomethyl Ionone description

Volatile fragrance and flavoring ingredient that must be listed on products that contain it due to its risk of causing a sensitised reaction at concentations as low as 0.001%. It’s an ingredient to avoid if you have sensitive skin, especially because it’s almost always combined with other volatile fragrance components such as linalool and eugenol.

Alpha Isomethyl Ionone references

  • Analytical and Bioanalytical Chemistry, July 2010, issue 6, pages 2579-2591
  • Journal of Chromatography, April 2010, issue 16, pages 2599-2605

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated