Hexamethylindanopyran
Hexamethylindanopyran
- Role
- A synthetic scent molecule used in fragrances.
- Catalog formulas
- 3
- Type
- Scent
- Verified
- 06.11.2026
What does this ingredient do in an antiperspirant?
Contributes to the scent of the blend; since 2023 it has been on the EU extended list of allergens that must be named separately.
Part of a system, not a label in isolation
In an antiperspirant or deodorant it only contributes to the scent and does not reduce sweating. Its presence in the list means the product is fragranced.
EU Regulation 2023/1545 added it to the list of fragrance allergens (Annex III, entry 336): above 0.001% in leave-on and 0.01% in rinse-off products it must be named separately in the ingredient list. New products must comply from 31 July 2026; products already on the market may be sold until 31 July 2028.
The 2012 SCCS opinion lists it as an established contact allergen in humans, with 11 to 100 positive patch-test reactions reported.
Not Acetyl Hexamethyl Indan, which is a different substance with its own Annex III entry 134.
Products containing Hexamethylindanopyran
Links are based on the complete published INCI list for the exact product version.
Sources
The conclusions apply to the stated conditions and jurisdictions, not automatically to every concentration or product.
- CosIng Checker: Annex III, entry 336 (Hexamethylindanopyran) Supports: restrictions, allergen labelling
- European Commission: fragrance allergens Supports: allergen labelling, Regulation 2023/1545 deadlines
- SCCS/1459/11: Opinion on fragrance allergens in cosmetic products Supports: allergenicity assessment