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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.
Esters are a very common class of compound in nature â all oils and waxes are esters. An ester is a combination of an alcohol and an acid. Cetearyl ethylhexanoate (PurCellin Oil) is a synthetic ester, it is a combination of cetyl and stearyl alcohols with 2-ethylhexanoic acid.Duck preening oils are a complex mixture of many compounds that include a range of natural wax esters, though not cetearyl ethylhexanoate.sters are a very common class of compound in nature â all oils and waxes are esters. An ester is a combination of an alcohol and an acid. Cetearyl ethylhexanoate (PurCellin Oil) is a synthetic ester, it is a combination of cetyl and stearyl alcohols with 2-ethylhexanoic acid.