An organic compound containing exactly two amine groups (-NH₂), widely used in the production of polymers, resins, and other industrial chemicals.
From 'dia-' (two) + 'amine' (from 'ammonia' derivative). The standard IUPAC chemical term for molecules with two amino groups, with alternative spelling 'diamin'.
Hexamethylenediamine is a diamine that reacts with adipic acid to make nylon—this one reaction changed the world, creating the first commercially successful synthetic fiber in the 1930s. Chemistry class is really materials science history in disguise.
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