A chemical compound or trade name for a substance containing two hydroxyl groups or derived from hydrogenation, sometimes used in manufacturing or pharmaceuticals.
From 'di-' (two) + 'hydro-' (hydrogen, water) + '-ol' (suffix for alcohols and compounds with hydroxyl groups). This term appears in early-to-mid 20th century chemical and pharmaceutical literature.
The '-ol' suffix is chemistry's way of saying 'contains OH groups'—from simple alcohol to complex dihydrol, it's like a naming system that lets you guess what atoms hide inside the molecule.
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