Barium, Peroxide Salts

Inorganic Methods. Before the development of electrolytic processes, hydrogen peroxide was manufactured solely from metal peroxides. Eady methods based on barium peroxide, obtained by air-roasting barium oxide, used dilute sulfuric or phosphoric acid to form hydrogen peroxide in 3—8% concentration and the corresponding insoluble barium salt. Mote recent patents propose acidification with carbon dioxide and calcination of the by-product barium carbonate to the oxide for recycle. 

Baryum, n. barium, -chlorhydrat, n. barium chloride. -hydrat, n. barium hydroxide, -hyperoxyd, n. barium peroxide, barium dioxide. -jodid, n. barium iodide, -lack, m. barium lake, -oxydhydrat, n. barium hydroxide. -platincyaniir, n. barium cyano-platinite, barium cyanoplatinate(II). -rho-danid, n. barium thiocyanate, -salz, n. bar ium salt. 

Banum oxide. [CAS 1304-28-5]. BaO. white solid, mp about 1900°C. reactive with H20 to forni barium hydroxide. Barium peroxide, Ba02-8H20, white precipitate, formed by reaction of barium salt solution and hydrogen or sodium peroxide, yields anhydrous banum peroxide upon heating at 100°C in a current of dry air. Anhydrous barium peroxide is also fonned by heating barium oxide in air or oxygen under pressure (at somewhat over one atmosphere pressure) and temperature of 400°C. 

This oxide, however, does not behave like an ordinary oxide for example, it does not react with water to give such a base as Ba(0H)4 nor with acids to yield such a salt as Ba(N03)4. Both oxygen atoms seem to be present as a single radical having the same valence, namely 2, as the simple oxygen radical in ordinary barium oxide, because, when barium peroxide is treated with acids, the ordinary barium salt and hydrogen peroxide are formed. 

Were the barium peroxide soluble this reaction would shortly come to equilibrium, but since the barium peroxide is very insoluble, the reaction is fairly complete. Sodium peroxide is soluble, and it hydrolyzes very extensively, as would be expected of the salt of so weak an acid this is equivalent to the statement that the neutralization of sodium hydroxide by hydrogen peroxide is very incomplete. 

The resulting solution will contain saline impurities such as salts of iron and manganese derived from the barium peroxide. These can be removed by the addition of a little phosphoric acid followed by neutralisation with barium hydroxide solution when the metals are precipitated as phosphates. If necessary, further addition of barium hydroxide may be made m order to precipitate the hydrogen peroxide as pure barium peroxide, which on treatment with the correct quantity of dilute sulphuric acid will give a pure solution of hydrogen peroxide. 

Under these conditions, water oxidation leads to formation of surface bound peroxides not O2 liberation. However, the peroxide can be scavenged by addition of bariim salts and the resultant insoluble barium peroxide can be decomposed by heating... 

Magnesium powder (no coarser than table salt). Barium peroxide (no coarser than table salt). Spoon. 

CYANAMIDE, CALCIUM SALT (156-62-7) Combustible solid. Dust or powder forms explosive mixture with air. Contact with water, steam causes decomposition, forming acetylene gas, ammonia, and calcium hydrogen cyanamide. Violent reaction with strong oxidizers, fluorine, strong acids. Incompatible with barium peroxide, boric acid, dry hydrogen, hydrogen peroxide. Contact with all solvents tested also causes decomposition. 

Barium dinitrate Barium nitrate Barium nitrate (6a(N03)2). Barium(ll) nitrate (1 2) CCRIS 4140 Dusicnan barnaty EINECS 233-020-5 HSDB 401 Nitrate de baryum Nitrate barico Nitric acid, barium salt Nitrobarite UN1446. Used in pyrotechnics, incendiaries, chemicals (barium peroxide), ceramic glazes, rodenticide, electronics. Crystals mp = 592" d = 3.23 freely soluble in H2O LDso (rat orl) = 355 mg/kg. Berk Pharm. ltd. Hoechst Celanese Noah Chem. San Yuan Chem. Co. Ltd. Sigma-Aldrich Fine Chem. 

Barium Dioxid—Barium peroxid—BaOi—168.8—is prepared by heating the monoxid in O. It is a grayish-white, amorphous solid. Heated in air it is decomposed BaOi=BaO- -0. Aqueous acids-dissolve it wth formation of a barytic salt and HjOj. 

B. Inhalation of insoluble inorganic barium salts can cause baritosis, a benign pneumoconiosis. One death resulted from barium peroxide inhalation. Detonation of barium styphnate caused severe poisoning from inhalation and dermal absorption. 

Ammonium nitrate Ammonium nitrite Ammonium oxalate Ammonium salicylate Ammonium sulfate Ammonium sulfide Ammonium sulfite Ammonium thiosulfate Amyl acetate Amyl alcohol Amyl chloride Amyl mercaptan Amyl naphthalene Amyl nitrate Amyl nitrite Amyl phenol Aniline hydrdochloride Aniline sulfate Aniline sulfite Animal fats Animal oils Anthraquinone Antimony sulfate Antimony tribromide Antimony trichloride Antimony trioxide Aqua regia Arsenic oxide Arsenic trichloride Arsenic trioxide Arsenic trisulfide Ascorbic acid Barium carbonate Barium chlorate Barium chloride, aqueous Barium cyanide Barium hydroxide Barium iodide Barium nitrate Barium oxide Barium peroxide Barium salts Beet sugar liquors Benzaldehyde Benzene... 

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