IONONE
IONONE is identified as a fragrance allergen subject to mandatory label declaration under Regulation (EC) No 1223/2009.
Regulatory data checked on 2026-09-05. The legal status follows Regulation (EC) No 1223/2009 and its annexes; the substance is identified from the European Commission's CosIng database.
About the ingredient
Ionone; (E)-4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-buten-2-one
New labelling obligation
IONONE is on the extended fragrance-allergen list of Regulation (EU) 2023/1545. Products placed on the market after 31 July 2026 must name it on the label when its concentration exceeds 0.001% (leave-on) or 0.01% (rinse-off).
The full list of new allergens and the deadlines — read the articleFunctions in cosmetics
Frequently asked questions
Is IONONE safe in cosmetics?
IONONE is a fragrance allergen that must be named in the ingredient list once it exceeds 0.001% in leave-on products or 0.01% in rinse-off products. Regulation (EU) 2023/1545 extended this labelling duty well beyond the original 26 substances.
What functions does IONONE perform in cosmetics?
According to the European Commission's CosIng database, IONONE performs the following functions in cosmetics: ASTRINGENT, PERFUMING. Functions are defined in the CosIng glossary and describe the technological role of a substance in the finished product.
Are there Safety Gate alerts concerning IONONE?
We found 1 recent alerts in the EU Safety Gate database in which IONONE appears in the risk description or on the ingredient list of a recalled cosmetic. The full list and details of each alert are below in the Safety Gate alerts section.
Safety Gate alerts mentioning this ingredient
We found 1 recent EU Safety Gate alerts that mention IONONE in the hazard description or ingredient list.