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Ester

Ester. Any organic salt that is formed by the reaction of organic acids with alcohols. Some of these compounds possess pleasant odors and are responsible for the flavor of many fruits and the fragrance of flowers. They are components of many fruit flavorings used by bakers in pastry fillings (q.v.) and cake icings (q.v.). Examples of widely used common esters are the fats (q.v.) which are formed by fatty acids (q.v.) reacting with glycerol (q.v.).