What is ester ?. In chemistry. Share with your friends Share 0 Suruchi Dipak Kalode answered this Dear student, Ester is a organic compounds that react with water to produce alcohols and organic or inorganic acids. General chemical formula is R-CO-OR . Ester is derived form carboxylic acid. Regards, 0 View Full Answer Arjun Baiju Supriya answered this Its a chemical used for various purposes like manufacturing perfumes 0