Peroxysulfuric Acid

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Peroxysulfuric Acid

 

(also called persulfuric acid), any of the oxy acids of sulfur that contain the peroxy group, —O—O—. Three peroxysulfuric acids are known: peroxymonosulfuric acid (H2SO5, also known as Caro’s acid), peroxydisulfuric acid (H2 S2 O8), and peroxytrisulfuric acid (H2 S3 O11). The most widely studied are H2SO5 and H2S2O8; their salts, which are called peroxysulfates, have also been widely studied. In the free state, H2SO5 and H2S2O8 occur as colorless crystals, with melting points of 45°C and 65°C, respectively; their aqueous solutions are obtained by electrolysis of sulfuric acid solutions. Peroxy- monosulfuric acid is a strong oxidizing agent that is used in organic synthesis. Peroxydisulfuric acid and its salts are also oxidizing agents, serving as sources of hydrogen peroxide (H2O2).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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