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BAO [2 records]

Record 1 2011-08-24

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
BaO2
formula, see observation
DEF

A compound ... obtained as a greyish white toxic powder by heating barium monoxide in air or oxygen and used chiefly in making hydrogen peroxide and in pyrotechnics.

OBS

... insoluble in water; used as a bleach and in the glass industry.

OBS

Exists also as a octahydrate BaO2.8H2O.

OBS

barium dioxide(2-): The "-" following the number 2 is a superscript which refers to the minus sign.

OBS

Chemical formula: BaO2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
BaO2
formula, see observation
CONT

Chauffé au rouge sombre dans un courant d'oxygène, l'oxyde de baryum se transforme en bioxyde BaO2, lequel se dissocie à température plus élevée; on s'est jadis servi de cette réaction pour extraire l'oxygène de l'air. Le bioxyde de baryum sert en outre à la préparation de l'eau oxygénée.

OBS

dioxyde(2-) de baryum : Le signe «-» qui suit le chiffre 2 entre parenthèses s'écrit en exposant.

OBS

Formule chimique : BaO2

Key term(s)
  • dioxyde de baryum

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
BaO2
formula, see observation
OBS

Fórmula química :BaO2</sub>

Save record 1

Record 2 2011-01-27

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
BaSO4
formula, see observation
BaO4S
formula, see observation
O4S·Ba
formula, see observation
7727-43-7
CAS number
DEF

A colorless crystalline insoluble salt ... occurring in nature as barite, obtained artificially by precipitation, and used chiefly as a pigment and extender, as a filler, and as a radiopaque substance.

OBS

Not to be confused with the more specific terms "barite" (native barium sulfate) and "blanc fixe" (an artificial barium sulfate used in paint industry).

OBS

Also known under a large number of commercial designations, such as: Actybaryte; Bakontal; Baridol; Barotrast; Barita White; Citobaryum; Colonatrast; Esophotrast; Eweiss; Finemeal; Lactobaryt; Liquibarine; Macropaque; Neobar; Oratrast; Raybar; Redi-Flow; Solbar; Supramike; Travad; Unibaryt.

OBS

Chemical formula: BaSO4 or BaO4S or O4S·Ba

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
BaSO4
formula, see observation
BaO4S
formula, see observation
O4S·Ba
formula, see observation
7727-43-7
CAS number
CONT

Le sulfate de baryum [...] est un produit naturel (barytine); on peut l'obtenir artificiellement par action de l'acide sulfurique sur un sel soluble de baryum. C'est un solide blanc très peu soluble dans l'eau [...]. On l'emploie en peinture, sous le nom de «blanc fixe» [...]. Le sulfate de baryum purifié [...] est employé en radiologie à cause de son opacité aux rayons X. Il permet d'obtenir en radioscopie et en radiographie l'image des cavités digestives.

OBS

sulfate de baryum : Existe dans la nature sous forme de minerai de barytine; également comme barytes, spath lourd. [...] Actybaryte, Bakontal, Baridol, Baritop, Barosperse, Citobaryum, E-Z-Paque, Lactobaryt, Micropaque, Neobar, Polybar, Radiobaryt, et Unibaryt sont des noms commerciaux.

OBS

Formule chimique : BaSO4 ou BaO4S ou O4S·Ba

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
BaSO4
formula, see observation
BaO4S
formula, see observation
O4S·Ba
formula, see observation
7727-43-7
CAS number
OBS

Fórmula química : BaSO4 o BaO4</sub>S o O4S·Ba

Save record 2

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