Perchloric Acid is a monobasic acid and have chemical formula HClO4. It is the one of the strongest (in aqueous solution, pK ≈ -10) acid, anhydrous form - an exceptionally strong oxidizer because it contains chlorine in the highest oxidation state +7. Perchloric Acid (in aqueous solution) is colorless volatile liquid, strongly fuming in the air, in pairs monomeric. Concentrated aqueous solutions of perchloric acid are widely used in analytical chemistry and for the production of perchlorates as well. Chloric acid is used in the decomposition of complex ores, in the analysis of minerals, and also as a catalyst.