3-Octanone3-Octanone is an organic compound with the formula. A colorless fragrant liquid, it is classified as a ketone. It is one of three octanones, the others being 2-octanone and 4-octanone.Occurrence3-Octanone is found in a variety of sources such as plants, herbs, and nectarines. It was also found to be present in Japanese catnip and the pine king bolete. It is produced by oyster mushrooms as an insecticide to kill roundworms.Uses3-Octanone is used as a flavor and fragrance ingredient.