Isoeugenol

isoeugenol

What it is: A relative of eugenol with a sweeter clove-and-carnation smell.
Why it is used: The spicy floral tone of carnation.
Where you usually find it: Ylang-ylang, nutmeg; perfumes.
Role in the fragrance: Heart note.

What EU law says

Annex III to Regulation (EC) No 1223/2009: its presence must be indicated in the list of ingredients when its concentration exceeds 0.001% in leave-on and 0.01% in rinse-off products. One of the 26 allergens introduced by Directive 2003/15/EC. In detergents it is listed above 0.01% by weight under Regulation (EC) No 648/2004. It is one of the stronger allergens, so Annex III also sets a maximum concentration for it.

In detail: fragrance allergens and the deadlines of Regulation 2023/1545