A chemical salt formed when a compound with two amine groups (nitrogen-containing groups) each reacts with hydrochloric acid.
From 'di-' (two) + 'hydro-' (hydrogen) + 'chloride' (salt of hydrochloric acid). This term became common in pharmaceutical chemistry in the 20th century to describe drugs with improved water solubility.
Many life-saving medications are dihydrochlorides because adding two HCl molecules makes drugs dissolve better in water and the body—it's a simple chemistry trick that helps medicines work faster!
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