Potassium sorbate is the potassium salt of sorbic acid, chemical formula CH3CH=CH?CH=CH?CO2K. It is a white salt that is very soluble in water (58.2% at 20 °C). It is primarily used as a food preservative (E number 202). Potassium sorbate is effective in a variety of applications including food, wine, and personal-care products.
While sorbic acid is naturally occurring in some berries, virtually all
of the world's production of sorbic acid, from which potassium sorbate
is derived, is manufactured synthetically.