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Ester Definition: An ester is an organic compound where the hydrogen in the compound's carboxyl group is replaced with a hydrocarbon group. Examples: Ethyl acetate is an ester. The hydrogen on the carboxyl group of acetic acid is replaced with an ethyl group. Article. Chemistry.
Ester Gum is a glycerol ester of wood rosin, widely used as thickening agent and texture stabilizer in food and beverage.ster Gum is an ester of wood rosin. As a plant derived ingredients, Ester Gum is general recognized as Kosher classified as Parve.