2-UNDECENAL is graded A (Safe) by Expert·ING, based on COSING regulatory data.

2-UNDECENAL

Safety grade: A

2-Undecenal is a fragrance chemical that produces a fresh, citrusy, slightly waxy scent similar to orange peel or aldehydic citrus notes. It is a small organic molecule used to add or enhance pleasant aromas in cosmetic products.

This ingredient is used in cosmetic formulations solely to contribute a fresh, citrus-like fragrance to products such as perfumes, lotions, and creams.

Graded using: COSING.

Last verified: May 26, 2026