+A **hydroxyl group** (–OH) is a simple pair of oxygen and hydrogen atoms, bound together. It's a fundamental [functional group](/wiki/functional_group) that influences the properties of countless [molecules](/wiki/molecule) in organic chemistry, making them often polar and reactive.
+## See also
+- [Alcohol](/wiki/alcohol)
+- [Carboxylic Acid](/wiki/carboxylic_acid)
+- [Phenol](/wiki/phenol)
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