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Barium peroxide

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Barium peroxide Basic information
Barium peroxide Chemical Properties
  • Melting point:450 °C
  • Boiling point:losesO2 at 800°C
  • Density 4,96 g/cm3
  • Flash point:21 °C
  • form Powder
  • color White
  • Specific Gravity4.96
  • OdorOdorless
  • Water Solubility Insoluble in water
  • Sensitive Moisture Sensitive
  • Merck 14,989
  • Stability:Stable. Strong oxidizer - contact with combustible material may cause fire. Incompatible with organic materials, combustible materials, reducing agents, most common metals.
  • CAS DataBase Reference1304-29-6(CAS DataBase Reference)
  • EPA Substance Registry SystemBarium peroxide (Ba(O2)) (1304-29-6)
Safety Information
  • Hazard Codes O,Xn
  • Risk Statements 8-20/22
  • Safety Statements 13-27
  • RIDADR UN 1449 5.1/PG 2
  • WGK Germany 1
  • RTECS CR0175000
  • 3-9-23
  • TSCA Yes
  • HazardClass 5.1
  • PackingGroup II
  • HS Code 28164000
  • ToxicityLD50 scu-mus: 50 mg/kg ZVKOA6 19,186,74
Barium peroxide Usage And Synthesis
  • Chemical PropertiesBarium peroxide is a grayish-white powder.
  • Physical propertiesBaO2 is an iron gray or white powder. It is slowly decomposed in air, forming the hydroxide and oxygen. It does not dissolve in water, but can slowly hydrolyze, forming hydrogen peroxide in solution. Barium peroxide is a strong oxidizing agent and will explode if direct contact with organic matter occurs. Therefore, barium peroxide is always diluted to form a slurry before usage. Barium peroxide is a strong oxidizing agent that is used for bleaching. Barium peroxide contains O22- subunits wherein the oxygen atoms bond to each other as well as to the barium.
  • UsesBariumperoxide is used as a hydrogen peroxide source and oxygen oxidant, as well as a bleaching agent. Its main usage has been for making hydrogen peroxide and oxygen, in organic syntheses, fabric printing and dyeing. Barium peroxide is available commercially, primarily as the oxctahydrate (which is the more stable form of this peroxide).
  • UsesBarium peroxide (BaO2) is a grayish-white dry powder that makes an excellent bleaching agent that can be stored in paper packages. Its bleaching qualities are released when mixed with water.
  • UsesBleaching animal substances, vegetable fibers and straw; glass decolorizer; manufacture of H2O2 and oxygen; dyeing and printing textiles; with powdered aluminum in welding; in cathodes; in igniter compositions. Oxidizing agent in organic synthesis.
  • Production MethodsBarium peroxide, BaO2, was the first-known peroxo compound. It was used until mid-1900 in the manufacture of oxygen by the Brin process and of hydrogen peroxide by the Thenard reaction.
  • PreparationBarium peroxide is best prepared by reacting barium nitrate with sodium peroxide in a cold solution:
    The hydrated form is usually the octahydrate. If the anhydrate is desired, the hydrated peroxide is dried a
  • Definitionbarium peroxide: A dense offwhitesolid, BaO2, prepared by carefullyheating barium oxide inoxygen; r.d. 4.96; m.p. 450°C. It is used as a bleaching agent. Withacids, hydrogen peroxide is formedand the reaction is used in the laboratorypreparation of hydrogen peroxide.
  • General DescriptionA grayish-white granular solid. Insoluble in water. Noncombustible, but accelerates the burning of combustible material. Mixture with finely divided combustible material may be explosive. Mixtures with combustible material may be ignited by friction or contact with moisture.
  • Air & Water ReactionsDecomposed by water. Insoluble in water.
  • Reactivity ProfileBarium peroxide is a strong oxidizing agent. Contact with water can produce a temperature and oxygen concentration high enough to ignite organic materials [Bretherick's, 5th ed., 1995, p. 94]. Reacts explosively with acetic anhydride due to the formation of acetyl peroxide [Rust, 1948, p. 337]. Ignites when mixed with powdered aluminum, powdered magnesium or calcium-silicon alloys. Wood may ignite with friction from the peroxide. Decomposes when heated to 700°C to produce barium oxide and pure oxygen [Sax, 9th ed., 1996, p. 317]. Forms highly reactive mixtures with fuel-type materials.
  • HazardOxidizing material. Fire and explosion risk in contact with organic materials. Keep cool and dry. Toxic by ingestion, skin irritant.
  • Health HazardInhalation causes irritation of mucous membranes, throat, and nose. Contact with eyes or skin causes severe burns. Ingestion causes excessive salivation, vomiting, colic, diarrhea, convulsive tremors, slow, hard pulse, and elevated blood pressure; hemorrhages may occur in the stomach, intestines, and kidneys; muscular paralysis may follow.
  • Fire HazardBehavior in Fire: Can increase intensity of fire.
  • Safety ProfileA poison via subcutaneous route. A powerful oxidtzer. Explodes on contact with acetic anhydride. Ignites when mixed with calcium-silicon alloys, powdered aluminum, powdered magnesium, water + organic compounds. Mixtures with propane react violently when heated. The powder ignites when heated to 265℃ with selenium. Wood ignites with friction from the peroxide. Incompatible with H2S, water, peroxyformic acid, hydroxylamine solution, mixture of (Mg + Zn + Ba(NO3)2), and organic matter. See also BARIUM COMPOUNDS (soluble) and PEROXIDES, INORGANIC.
  • Potential ExposureIs used as a bleaching agent; in making hydrogen peroxide, oxygen; in aluminum welding; in textile dyeing and for bleaching fibers; animal substances.
  • ShippingUN1449 Barium peroxide, Hazard Class: 5.1; Labels: 5.1—Oxidizer, 6.1—Poisonous materials.
  • IncompatibilitiesA strong oxidizer. Keep away from organic and combustible materials (such as wood, paper, oil, fuels, and other easily oxidized materials) and peroxyformic acid, hydrogen sulfide and hydroxylamine solutions, since violent reactions occur.
  • Waste DisposalDispose of contents and container to an approved waste disposal plant. All federal, state, and local environmental regulations must be observed. Contact your local or federal environmental protection agency for specific recommendations.
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