Alpha-Isomethyl Ionone
What is it?
Alpha-Isomethyl Ionone is a colorless or pale straw-colored liquid. In cosmetics and personal care products, Alpha-Isomethyl Ionone is used in the formulation of aftershave lotions, bath products, bubble baths, hair care products, moisturizers, perfumes and colognes, shampoos and skin care products.
Safety Information
The Food and Drug Administration (FDA) has approved the use of Alpha-Isomethyl Ionone as a flavoring agent for direct addition to food.
The safety of Alpha-Isomethyl Ionone has been evaluated by the Research Institute for Fragrance Materials Expert Panel (REXPAN). Based on this evaluation, an International Fragrance Association (IFRA) Standard has been established. The IFRA Standard restricts the use of mixed isomers of methyl ionone (including Alpha-Isomethyl Ionone) in fragrances because of potential sensitization.
Link to the IFRA Standards:
http://www.ifraorg.org/Home/Code,+Standards+Compliance/IFRA+...
The Cosmetic Ingredient Review (CIR) defers review of individual fragrance ingredients to the IFRA program unless the ingredient has significant uses other than as a fragrance. In this case, the ingredient may be assessed by both the CIR Expert Panel and REXPAN.
The safety of Alpha-Isomethyl Ionone has been evaluated by the Research Institute for Fragrance Materials Expert Panel (REXPAN). Based on this evaluation, an International Fragrance Association (IFRA) Standard has been established. The IFRA Standard restricts the use of mixed isomers of methyl ionone (including Alpha-Isomethyl Ionone) in fragrances because of potential sensitization.
Link to the IFRA Standards:
http://www.ifraorg.org/Home/Code,+Standards+Compliance/IFRA+...
The Cosmetic Ingredient Review (CIR) defers review of individual fragrance ingredients to the IFRA program unless the ingredient has significant uses other than as a fragrance. In this case, the ingredient may be assessed by both the CIR Expert Panel and REXPAN.
Why is it used in cosmetics and personal care products?
Scientific facts:
Alpha-Isomethyl Ionone is a synthetic fragrance compound also known as 3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one, or cetone.








