Chemical Property of Barium oxide [MI]
Chemical Property:
- Appearance/Colour:white to cream powder
- Melting Point:1923 °C
- Refractive Index:1.98
- Boiling Point:~2000 °C
- PSA：17.07000
- Density:5.72 g/cm3
- LogP:-0.11880
- Sensitive.:Moisture Sensitive
- Water Solubility.:Sparingly soluble in water. Soluble in ethanol, dilute mineral acids and alkali.
- Hydrogen Bond Donor Count:0
- Hydrogen Bond Acceptor Count:1
- Rotatable Bond Count:0
- Exact Mass:153.900162
- Heavy Atom Count:2
- Complexity:0
- Purity/Quality:
-
98% *data from raw suppliers
Barium oxide (99.5%-Ba) *data from reagent suppliers
Safty Information:
- Pictogram(s):
T
- Hazard Codes:T
- Statements:
20-25-34
- Safety Statements:
26-36/37/39-45
- MSDS Files:
-
SDS file from LookChem
Total 1 MSDS from other Authors
Useful:
- Canonical SMILES:[O-2].[Ba+2]
-
Physical properties
Barium Oxide is
a white, hygroscopic formed by the burning of Ba metal
in oxygen or the decomposition of the carbonate salt:
2Ba＋ O2→2BaO
BaCO3→BaO＋ CO2
It transforms into the hydroxide on contact with
water.
BaO＋H2O→Ba(OH)2
It is soluble in
ethanol, dilute acids and alkalis but insoluble in acetone
and liquid ammonia.
The monoxide is formed when the metal burns
in air, but is usually prepared by the ignition of the
nitrate, oxygen and oxides of nitrogen being liberated.
It can also be obtained by the ignition of an intimate
mixture of the carbonate and carbon, and in small quantities
by the ignition of the iodate.
-
Uses
Barium oxide is used as a coating for “hot cathodes”
in a variety of electronic devices such as TV’s and lamps.
It replaced lead oxide in the production of certain kinds
of glass. While lead oxide raised the refractive index of
the glass, it also raised the dispersion, i.e refraction of
various colors of light resulting in distortion of images
which barium oxide does not alter. Barium oxide also
has use as an ethoxylation catalyst in the reaction of ethylene oxide and alcohols which takes place between
150 and 200°C.
The thermionic emission from thin evaporated films
of barium oxide has been studied extensively. Thin
barium oxide films have a good emission following
evaporation. The emission improves a little during
heat treatment, and is then similar to that from a sprayed
cathode coating of barium oxide. Barium oxide is used in cathode ray tubes, crown glass, and catalysts. It is used for the adsorption NO and NO2. It also plays an important role for NO2 storage and reduction. It acts as an efficient ethoxylation catalyst. Porous grades are marketed especially for drying gases and solvents (particularly alcohols, aldehydes and petroleum solvents). Swells, but does not become sticky upon absorption of moisture. Used in manufacture of lubricating oil detergents. Also used for making barium methoxide.
