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    Salt is perhaps the oldest and most widely used natural preservative. Through the process of osmosis, salt draws moisture out of food, creating an environment where pathogens cannot thrive. It is commonly used in curing meats and pickling vegetables, making these foods not only safer but also imparting distinctive flavors.


    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 occurs naturally in rowan and hippophae berries, virtually all of the world's supply of sorbic acid, from which potassium sorbate is derived, is manufactured synthetically.