UNDECYLENAL ●
TL;DR. It is primarily a fragrance ingredient, adding a fatty, citrus-peel, green, slightly waxy aldehydic note at very low levels. It is an aroma modifier, not a skin-care active.
What does UNDECYLENAL do in a cosmetic formula?
It is primarily a fragrance ingredient, adding a fatty, citrus-peel, green, slightly waxy aldehydic note at very low levels. It is an aroma modifier, not a skin-care active.
Is UNDECYLENAL clean?
From a clean-beauty perspective, this ingredient carries more scrutiny than bland moisturizers because reactive fragrance aldehydes can irritate or sensitize some users at higher exposure. It is typically managed through IFRA concentration limits and fragrance-allergen disclosure rules where applicable.
Is UNDECYLENAL sustainable?
This material may be made from petrochemical or bio-based feedstocks, including routes linked to castor-derived chemistry. It is expected to biodegrade more readily than silicone or fluorinated materials, but fragrance manufacture and sourcing route determine its sustainability profile.
Is UNDECYLENAL COSMOS-approved?
It can fit COSMOS only when supplied as part of a compliant natural fragrance or natural-origin route that meets the standard’s fragrance rules. Synthetic fragrance-grade versions have weaker alignment with COSMOS and Green Chemistry, even though the molecule is used at very low concentrations.
How does UNDECYLENAL work chemically?
The molecule is a long-chain unsaturated aldehyde, which explains its strong odor impact and its reactivity compared with saturated emollients or humectants. In finished products it is usually present at trace fragrance levels, and formulators manage oxidation and stability with closed storage, antioxidants, and compatibility checks in the fragrance concentrate.
Last updated 2026-05-15