2021-6-24 · Potassium sorbate is a mildpreservative. Its primary use is as a food preservative (E number 202). Itsmolecular formula is C6H7O2K and its systematic name is potassium (E,E)-hexa-2,4-dienoate. Potassium sorbateis effective in a variety of applications including food, wine, and personalcare.