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In chemistry, peroxides are a group of compounds with the structure , where R is any element. The group in a peroxide is called the peroxide group or peroxy group (sometimes called peroxo group or peroxyl group). The nomenclature is somewhat variable, and the term was introduced by Thomas Thomson in 1804 for an oxide with the greatest quantity of oxygen. The most common peroxide is hydrogen peroxide (), colloquially known simply as "peroxide". It is marketed as solutions in water at various concentrations. Many organic peroxides are known as well. In addition to hydrogen peroxide, some other major classes of peroxides are: Peroxy acids, the peroxy derivatives of many familiar acids, examples being peroxymonosulfuric acid and peracetic acid, and their salts, one example of which is potassium peroxydisulfate. Main group peroxides, compounds with the linkage (E = main group element). Metal peroxides, examples being barium peroxide (), sodium peroxide () and zinc peroxide (). Organic peroxides, compounds with the linkage or . One example is tert-butylhydroperoxide.
Athanasios Nenes, Gerhard Lammel