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.