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288497

Sigma-Aldrich

Barium oxide

97%

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Synonym(s):
Barium monoxide
Linear Formula:
BaO
CAS Number:
Molecular Weight:
153.33
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

Assay

97%

form

powder

reaction suitability

reagent type: catalyst
core: barium

impurities

1-4% adsorbed H2O/CO2

density

5.72 g/mL at 25 °C (lit.)

SMILES string

O=[Ba]

InChI

1S/Ba.O

InChI key

QVQLCTNNEUAWMS-UHFFFAOYSA-N

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1 of 4

This Item
554847202738413615
Barium oxide 97%

Sigma-Aldrich

288497

Barium oxide

Barium oxide 99.99% trace metals basis

Sigma-Aldrich

554847

Barium oxide

Barium chloride 99.999% trace metals basis

Sigma-Aldrich

202738

Barium chloride

Barium iodide AnhydroBeads™, −10 mesh, 99.995% trace metals basis

Sigma-Aldrich

413615

Barium iodide

form

powder

form

powder

form

powder and chunks

form

beads

density

5.72 g/mL at 25 °C (lit.)

density

5.72 g/mL at 25 °C (lit.)

density

3.856 g/mL at 25 °C (lit.)

density

5.15 g/mL at 25 °C (lit.)

reaction suitability

reagent type: catalyst
core: barium

reaction suitability

reagent type: catalyst
core: barium

reaction suitability

-

reaction suitability

-

impurities

1-4% adsorbed H2O/CO2

impurities

-

impurities

≤15.0 ppm Trace Metal Analysis

impurities

≤55.0 ppm Trace Metal Analysis

General description

Barium oxide, also known as barium(II) oxide, is a white or off-white fine powder with a melting point exceeding 1,800 °C. It is a highly stable compound with a high melting point and good chemical resistance, making it suitable for use in a wide range of applications. There are several methods to produce barium oxide including the thermal decomposition of barium carbonate and the electrolysis of barium chloride.

Application

Barium oxide is used in a variety of applications. It is used as a raw material in the production of ceramics, such as glazes and ceramic pigments. It is used as a refractory material in the production of furnace linings and high-temperature applications. It is used as a fluxing agent in the production of glass, helping to lower the melting point and improve the clarity of glass. It is used as a catalyst in the production of polyethylene and other polymers. It is often used as a starting material to produce other barium compounds or dope semiconductors.

Features and Benefits

Used in the synthesis of the high-κ material BST (barium strontium titanate). Used in the study of NOX storage.

Pictograms

CorrosionSkull and crossbones

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Oral - Acute Tox. 4 Inhalation - Eye Dam. 1 - Skin Corr. 1B

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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D J Harris et al.
Physical chemistry chemical physics : PCCP, 7(8), 1839-1844 (2005-04-21)
We have modelled the surface diffusion and growth of BaO and SrO both in the homoepitaxial and heteroepitaxial (BaO on SrO and SrO on BaO) cases. The diffusion proceeds most favourably by an exchange mechanism involving the surface layer. When
Janós Szanyi et al.
The journal of physical chemistry. B, 109(1), 27-29 (2006-07-21)
Temperature programmed desorption, infrared spectroscopy, and (15)N solid state NMR spectroscopy were used to characterize the nature of the nitrate species formed on Al(2)O(3) and BaO/Al(2)O(3) NO(x) storage/reduction materials. Two distinctly different nitrate species were found: surface nitrates that are
Hao Kong et al.
The Analyst, 136(18), 3643-3648 (2011-07-29)
Thermochemiluminescence (TCL) of organic compounds or biological substances is an interesting phenomenon and has been applied to polymer analysis and medical diagnostics. We improve traditional TCL assays using the assistance of catalytic nanomaterials and construct a nanomaterials array for the
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Langmuir : the ACS journal of surfaces and colloids, 25(18), 10820-10828 (2009-07-11)
Reactions of NO2, H2O, and CO2 with a thick (>20 monolayer equivalent (MLE)) BaO film supported on Pt(111) were studied with temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). NO2 reacts with a thick BaO layer to form surface

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