Skip to main content

Barium peroxide


Barium peroxide is the chemical compound with the formula BaO2. This grey-white solid is one of the most common inorganic peroxides. Barium peroxide is an oxidizing agent, which is used for bleaching. It is used in fireworks as an oxidizer, which also gives a vivid green colour, as do all barium compounds. Barium peroxide is a peroxide, containing O22- subunits wherein the oxygen atoms bond to each other as well as to the barium. The solid adopts the same structure as calcium carbide, CaC2. Barium peroxide arises by the reversible absorption of O2 by barium oxide. The oxygen is released above 1100 K. : 2 BaO + O2 2 BaO2 This reaction is the basis for the now-obsolete Brin process for separating oxygen from the atmosphere. It is driven by differences in the vibrational entropy of the O2 molecule in comparison to the solid phases in the reversible reaction. Other oxides, e.g. Na2O and SrO, behave similarly. Hydrogen peroxide can also be prepared via the related reaction: :BaO2 + H2SO4 → H2O2 + BaSO4 The insoluble barium sulfate is filtered from the mixture.


Substance data page for Barium peroxide


Chemistry educational resource for Barium peroxide (standard InChIKey ZJRXSAYFZMGQFP-UHFFFAOYSA-N). Barium dioxidanediide (IUPAC Name); Barium dioxide; Barium peroxide (Ba(O2)); Barium superoxide. Follow the page link to go to the compound page on the Learn Chemistry wiki.