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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.
What makes Ester-CÂ® different to ordinary Vitamin C? If youâve been reading health magazines, or scanning the shelves at your pharmacy or health food store, youâll have no doubt heard of Ester-CÂ®. Ester-CÂ® is a special form of Vitamin C, produced using a water-based process that renders it non-acidic. Itâs also easier to absorb and longer lasting than ordinary Vitamin C. Thatâs important because most people donât realise how quickly ordinary Vitamin C molecules break down â often within a couple of hours.