carboxylic acid anion carboxylic acid Carbonsaeuren Karbonsaeure acides carboxyliques acido carboxilico Carbonsaeure carboxylic acid carboxylic acid A carbon oxoacid acid carrying at least one ‒C(=O)OH group and having the structure RC(=O)OH, where R is any any monovalent functional group. Carboxylic acids are the most common type of organic acid. acide carboxylique RC(=O)OH carboxylic acids carboxylic acids acidos carboxilicos carbon oxoacid carbonyl compound carboxy group organic acid