Peroxymonophosphoric acid
Peroxymonophosphoric acid () is an oxyacid of phosphorus. It is a colorless viscous oil. Its salts are called peroxymonophosphates. Another peroxyphosphoric acid is peroxydiphosphoric acid, . Preparation Peroxyphosphoric acids were first synthesized and characterized in 1910 by Julius Schmidlin and Paul Massini via the reaction between phosphorus pentoxide and highly-concentrated aqueous solution of hydrogen peroxide. However, this reaction proceeds very vigorously and is difficult to control. Aside from phosphorus pentoxide, syntheses from metaphosphoric acid and diphosphoric acid were also reported. P2O5 + 2H2O2 + H2O -> 2H3PO5 H4P4O12 + 4H2O2 -> 4H3PO5 H4P2O7 + H2O2 -> H3PO5 + H3PO4 A less vigorous method of preparing peroxyphosphoric acid by introducing the inert solvent acetonitrile was described by Gerrit Toennies in 1937. This method was shown to be unsuitable in diethyl ether or isoamyl alcohol. Contemporary methods Peroxyphosphoric acid is usually produced by treating phosphorus pentoxide and concentrated hydrogen peroxide within an inert solvent like acetonitrile or carbon tetrachloride.. One method of preparation is the hydrolysis of potassium of lithium peroxydiphosphate in a strong acid such as perchloric acid. The peroxydiphosphate salts can be obtained by electrolysis of their respective phosphate salts. Peroxydiphosphoric acid is obtained when phosphoric acid is treated with