2-Undecenal

Chemical properties

2-Undecenal has a powerful, fresh aldehydic odor. The commercial product is a mixture of several isomers of undecylenic aldehyde. This compound exhibits fungistatic activity.

Physical properties

Colorless or very pale straw-colored oily liquid.
Insoluble in water, soluble in alcohol and oils.

Occurrence

Reported found among the volatile components in fish products, also formed in the oxidative decomposition of heated lard; its presence in nature has been reported in cranberry and bilberry, milk, cooked chicken, heated beef and pork, roasted filberts, roasted peanuts, pecans, coriander seed and leaf, soybean, kiwifruit and potato chips.

Preparation

2-Undecenal can be produced by condensation of Acetaldehyde with Nonanal. It can also be produced via alphu-Bromo undecanoic acid.

Definition

ChEBI: 2-undecenal is an undecenal in which the C=C bond is located at the 2-3 position. It is an undecenal, a n-alk-2-enal and a volatile organic compound.

Taste threshold values

Taste characteristics at 15 ppm: waxy, addehydic, green, with a citrus and meaty nuance.