4-Heptanone or heptan-4-one is an organic compound with the formula (CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>)<sub>2</sub>CO. It is a colorless liquid.
The compound is synthesized by ketonization, involving the pyrolysis of iron(II) butyrate.
Butyrone is used in the synthesis of 3-propylthio-4-heptanol, which has found use as a flavor augmenting or enhancing composition in foodstuffs.