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).[4] Potassium sorbate is effective in a variety of applications including food, wine, and personal care products Potassium sorbate can be found in a variety of sources, mainly as a preservative in preprocessed foods because it helps to prevent mold, fungi and yeast growth that can cause foods to spoil. This chemical can easily be produced and is quite inexpensive, making it an ideal choice for many industrial applications as well. While the material is generally considered safe for contact and consumption, it can be harmful if it is used excessively. Those who are allergic to potassium may also have difficulties consuming foods or using products that have potassium sorbate as a preservative. Learning about how potassium sorbate works and what products it is typically used in can help you avoid discomfort and keep yourself safe