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

TRIMETHYLDECENEDIONE

Safety grade: A

Trimethyldecenedione is a synthetic chemical compound used in cosmetics to help brighten skin and remove impurities. It works by binding to unwanted metal ions and reducing discoloration.

This ingredient brightens the complexion by chelating metal ions that can cause discoloration and acts as a bleaching agent to help even out skin tone.

Graded using: COSING.

Last verified: May 26, 2026