What it is
Trans-2-Hexenal is a small unsaturated aldehyde responsible for the fresh, green scent of cut grass and unripe fruit. In cosmetics it is used in trace amounts as a fragrance or flavor-type aroma constituent. It occurs widely in plants and is also produced synthetically for aroma use.
Safety & warnings
As a reactive volatile aldehyde, it is a recognized skin sensitizer and is used only at very low fragrance levels; individuals with fragrance sensitivities or aldehyde reactivity may wish to avoid it.
Origin & sourcing
Occurs naturally in many fruits and green plant tissues; also manufactured synthetically for fragrance use.
Questions everyone asks
Why does trans-2-hexenal smell like grass?
It is the green leaf aldehyde naturally responsible for the scent of cut grass and unripe fruit.
Is it a fragrance ingredient?
Yes; it is used in trace amounts to contribute a fresh, green aroma.