Potassium sorbate is a salt derived from sorbic acid, a naturally occurring organic compound found in some fruits and berries. It is a widely used food preservative and is also used in the production of some personal care products and pharmaceuticals. Potassium sorbate is effective in preventing the growth of bacteria, yeast, and mold in food products by inhibiting their ability to reproduce. It is commonly used in a variety of food products, including cheese, baked goods, and dried fruits.