A chemical compound containing two phenol groups (hydroxyl groups attached to benzene rings).
From 'bi-' (two) and 'phenol,' which comes from 'phenyl' (a benzene-derived group) and '-ol' (denoting an alcohol or hydroxyl-containing compound). Used in chemistry since the mid-1900s.
Biphenols are used in some industrial processes and antiseptics, but they're cousins of BPA—the chemical that became notorious for being in plastic bottles because it can leach into food and water.
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