Barium peroxide

Barium peroxide

Chembox new
ImageFile =
ImageSize =
IUPACName = barium peroxide
OtherNames = Barium binoxide, Barium dioxide, Barium superoxide, UN 1449
Section1 = Chembox Identifiers
CASNo = 1304-29-6
EINECS = 215-128-4
PubChem = 14773
SMILES =
RTECS = CR0175000
Section2 = Chembox Properties
Formula = BaO2
MolarMass = 169.33 g/mol
Appearance = Grey-white crystalline solid
Density = 4.95 g/cm³, solid
MeltingPt = 450 °C (723 K)
BoilingPt = 800 °C (1073 K) (decomp. to BaO + O2)
Solubility = Slightly soluble
Section7 = Chembox Hazards
MainHazards = Harmful (Xn)
NFPA-H = 1
NFPA-F = 0
NFPA-R = 0
NFPA-O = ox
RPhrases = R8 R20/22
SPhrases = S2 S13 S27
FlashPt =
Autoignition =

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, [cite web | title = Data Sheet | work = Data Sheet | publisher = Hummel Croton Inc | url = http://www.hummelcroton.com/data/bao2_d.html | accessdate = 2007-02-01 ] 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 700°C.: BaO + 1/2 O2 unicode|⇌ BaO2This reaction is the basis for the now-obsolete Brin Process for separating oxygen from the atmosphere. Other oxides, e.g. Na2O, behave similarly. [Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.]

Hydrogen peroxide can also be prepared via the related reaction::BaO2 + H2SO4 → H2O2 + BaSO4

Footnotes

ee also

*Barium oxide

External links

*ICSC|0381|03
* [http://www.jtbaker.com/msds/englishhtml/b0384.htm MSDS at jtbaker.com]


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Look at other dictionaries:

  • barium peroxide — n. a gray white powder, BaO2, used as a bleach and in making hydrogen peroxide: also barium dioxide …   English World dictionary

  • barium peroxide — noun a white toxic powder obtained by heating barium oxide in air • Syn: ↑barium dioxide • Hypernyms: ↑baryta * * * noun also barium dioxide : a compound BaO2 obtained as a grayish white toxic powder by heating barium monoxide in air or oxygen… …   Useful english dictionary

  • barium peroxide — Chem. a grayish white, water insoluble, poisonous powder, BaO2, used chiefly in the manufacture of hydrogen peroxide and as a bleaching agent for textiles. Also called barium dioxide. * * * …   Universalium

  • Barium — (pronEng|ˈbɛəriəm) is a chemical element. It has the symbol Ba, and atomic number 56. Barium is a soft silvery metallic alkaline earth metal. It is never found in nature in its pure form due to its reactivity with air. Its oxide is historically… …   Wikipedia

  • barium — /bair ee euhm, bar /, n. Chem. a whitish, malleable, active, divalent, metallic element, occurring in combination chiefly as barite or as witherite. Symbol: Ba; at. wt.: 137.34; at. no.: 56; sp. gr.: 3.5 at 20°C. [1800 10; BAR(YTES) + IUM] * * *… …   Universalium

  • Peroxide — A peroxide is a compound containing an oxygen oxygen single bond. The simplest stable peroxide is hydrogen peroxide. Superoxides, dioxygenyls, ozones and ozonides compound are considered separately. NOTOC Organic chemistry In organic chemistry,… …   Wikipedia

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  • barium dioxide — noun a white toxic powder obtained by heating barium oxide in air • Syn: ↑barium peroxide • Hypernyms: ↑baryta * * * noun see barium peroxide …   Useful english dictionary

  • Barium oxide — Chembox new Name = Barium oxide OtherNames = Barium monoxide; barium protoxide; calcined baryta Section1 = Chembox Identifiers CASNo = 1304 28 5 Section2 = Chembox Properties Formula = BaO MolarMass = 153.3 g/mol Appearance = white solid Density …   Wikipedia

  • Barium hydroxide — Chembox new Name = Barium hydroxide Section1 = Chembox Identifiers CASNo = 17194 00 2 RTECS = CQ9200000 Section2 = Chembox Properties Formula = Ba(OH)2 MolarMass = 171.342 g/mol (anhydrous) 189.36 g/mol (monohydrate) 315.46 g/mol (octahydrate)… …   Wikipedia

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