Crotonaldehyde cis-3-Hexanal 2-Nonenal (E,E)-2,4-Decadienal is an aromatic substance found in butter, cooked beef, fish, potato chips, roasted peanut,[2] buckwheat[3] and wheat bread crumb.

[4] In an isolated state, it smells of deep fat flavor, characteristic of chicken aroma (at 10ppm).

At lower concentration, it has the odor of citrus, orange or grapefruit.

[5] It has been used as aroma in the EU, but use restrictions apply until the required data have been submitted.

You can help Wikipedia by expanding it.This biochemistry article is a stub.