The chemical group “–OH” is known as a hydroxyl group. It consists of one oxygen atom bonded to one hydrogen atom. Hydroxyl groups are commonly found in alcohols, which are organic compounds that can be used in beverages, solvents, and fuels. The presence of a hydroxyl group in a molecule often increases its solubility in water. In addition to alcohols, hydroxyl groups are also present in other important compounds, such as carbohydrates and phenols. The reactivity of the hydroxyl group allows it to participate in various chemical reactions, making it a crucial component in organic chemistry and biochemistry.