a colourless syrupy oxyacid of chlorine containing a greater proportion of oxygen than chloric acid. It is a powerful oxidizing agent and is used as a laboratory reagent. Formula: HClO4
Systematic name: chloric(VII) acid
perchloric acid in American English
(pərˈklɔrɪk)
a colorless, liquid acid, HClO4, that is a strong oxidizing agent: its concentrated solutions can form explosive mixtures with reducing agents: used in analytical chemistry, in making solid propellants, etc.