1. 
   peroxides
   Peroxides are compounds of structure ROOR in which R may be any organic group. In inorganic chemistry, salts of the anion O2-2. They are strong oxidizing agents.
   Found op http://www.ktf-split.hr/periodni/en/abc/p.html
   
   
2. 
   peroxides
   A group of compounds that contain a bivalent o-o group, i.e., the oxygen atoms are univalent. Such compounds release atomic (nascent) oxygen readily. Thus they are strong oxidizing agents and fire hazards when in contact with combustible materials, especially under high-temperature conditions. The c...
   Found op http://www.mondofacto.com/facts/dictionary?peroxides
   
   
3. 
   peroxides
   Compounds of oxygen that contain the O₂^2- ion. Alkali metals and alkaline earth metal peroxides are formed by heating the metals or their oxides in excess air. Covalent peroxides include peracetic acid and peroxymonosulfuric acid ('Caro's acid'). They ar...
   Found op http://www.daviddarling.info/encyclopedia/P/peroxide.html
   
   

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