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ISOMETHYL-BETA-IONONE

CAS 79-89-0
68

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

Isomethyl-beta-ionone is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.

Isomethyl-beta-ionone (also known as irone or 4-(2,5,6,6-tetramethyl-2-cyclohexen-1-yl)-3-buten-2-one) is a synthetic fragrance belonging to the ionone family. It imparts violet, iris-like notes and is widely used in perfumes, soaps, and cosmetics. While generally safe at low concentrations, it has been identified as a potential skin sensitizer and is subject to IFRA guidelines restricting its use in leave-on products to minimize sensitization risk.

Known concerns

  • Potential skin sensitizer (IFRA restriction applies)

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.