The term “carboxyl” refers to a functional group in organic chemistry that consists of a carbon atom double-bonded to an oxygen atom and also bonded to a hydroxyl group (-OH). This functional group is represented as -COOH and is characteristic of carboxylic acids, which are compounds that contain this group. The carboxyl group is known for its acidic properties, as it can donate a proton (H+) in solution, making carboxylic acids weak acids.
