hýdroxýl
Hydroxyl refers to a functional group in chemistry composed of one oxygen atom and one hydrogen atom, with the chemical formula −OH. It is a polar group and is often found in organic compounds, where it is responsible for many characteristic properties. The hydroxyl group is the defining feature of alcohols, where it is attached to a saturated carbon atom. For example, ethanol, a common alcohol, has the chemical formula CH3CH2OH.
When a hydroxyl group is bonded to an oxygen atom, it forms a hydroperoxide group (−OOH). In