hydrogen peroxide

a colorless, unstable, oily liquid, H2O2, an aqueous solution of which is used chiefly as an antiseptic and a bleaching agent.
[1870-75]

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      (H2O2), a colourless liquid usually produced as aqueous solutions of various strengths, used principally for bleaching cotton and other textiles and wood pulp, in the manufacture of other chemicals, as a rocket propellant, and for cosmetic and medicinal purposes. Solutions containing more than about 8 percent hydrogen peroxide are corrosive to the skin.

      First recognized as a chemical compound in 1818, hydrogen peroxide is the simplest member of the class of peroxides (q.v.). Of the several processes of manufacture, the principal ones involve reactions of oxygen from the air with certain organic compounds, especially anthraquinone or isopropyl alcohol. Major commercial grades are aqueous solutions containing 35, 50, 70, or 90 percent hydrogen peroxide and small amounts of stabilizers (often tin salts and phosphates) to suppress decomposition.

      Hydrogen peroxide decomposes into water and oxygen upon heating or in the presence of numerous substances, particularly salts of such metals as iron, copper, manganese, nickel, or chromium. It combines with many compounds to form crystalline solids useful as mild oxidizing agents; the best-known of these is sodium perborate (NaBO2·H2O2·3H2O or NaBO3·4H2O), used in laundry detergents and chlorine-free bleach products. With certain organic compounds, hydrogen peroxide reacts to form hydroperoxides or peroxides, several of which are used to initiate polymerization reactions. In most of its reactions, hydrogen peroxide oxidizes other substances, although it is itself oxidized by a few compounds, such as potassium permanganate.

      Pure hydrogen peroxide freezes at -0.43° C (+31.3° F) and boils at 150.2° C (302° F); it is denser than water and is soluble in it in all proportions.

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Universalium. 2010.

Look at other dictionaries:

  • Hydrogen peroxide — IUPAC name …   Wikipedia

  • hydrogen peroxide — hydrogen peroxide. См. перекись водорода. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • hydrogen peroxide — n an unstable compound H2O2 used esp. as an oxidizing and bleaching agent and as an antiseptic * * * a colourless liquid used as a disinfectant for cleansing wounds and, diluted, as a deodorant mouthwash. Strong solutions irritate the skin. * * * …   Medical dictionary

  • hydrogen peroxide — ► NOUN ▪ a colourless viscous liquid used in some disinfectants and bleaches …   English terms dictionary

  • hydrogen peroxide — n. a colorless, syrupy liquid, H2O2, often used in dilute, unstable solutions as a bleaching or disinfecting agent, and in more concentrated form as a rocket fuel, in the production of foam rubber, etc …   English World dictionary

  • hydrogen peroxide — noun a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels (Freq. 1) • Syn: ↑peroxide • Derivationally… …   Useful english dictionary

  • hydrogen peroxide — (= H2O2) Hydrogen peroxide is produced by vertebrate phagocytes and is used in bacterial killing (the myeloperoxidase halide system) …   Dictionary of molecular biology

  • hydrogen peroxide — N UNCOUNT Hydrogen peroxide is a chemical that is often used to make hair lighter or to kill germs …   English dictionary

  • hydrogen peroxide — an oxidizing agent used (in the form of a solution or cream) as a skin disinfectant for cleansing wounds and treating superficial bacterial infections. Diluted hydrogen peroxide solution is used as a deodorant mouthwash for treating oral… …   The new mediacal dictionary

  • hydrogen peroxide — vandenilio peroksidas statusas T sritis chemija apibrėžtis Stiprus oksidatorius. formulė H₂O₂ atitikmenys: angl. hydrogen peroxide rus. водорода перекись; водорода пероксид ryšiai: sinonimas – divandenilio dioksidas …   Chemijos terminų aiškinamasis žodynas

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