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Barium oxide

Barium oxide
Barium oxide structure
Chemical Name:
Barium oxide
Baryta;Barsito;Oxobarium;BARIUM OXIDE;oxydedebaryum;calcinedbaryta;BARIUM MONOXIDE;bariumprotoxide;Calcined baryta;Oxyde de baryum
Molecular Formula:
Formula Weight:
MOL File:

Barium oxide Properties

Melting point:
1920 °C
Boiling point:
2000 °C
5.72 g/mL at 25 °C(lit.)
refractive index 
Specific Gravity
Light yellow-greenish to grayish
Water Solubility 
Sparingly soluble in water. Soluble in ethanol, dilute mineral acids and alkali.
Moisture Sensitive
Stable. Incompatible with strong acids, water. Protect from moisture.
CAS DataBase Reference
1304-28-5(CAS DataBase Reference)
EWG's Food Scores
EPA Substance Registry System
Barium oxide (1304-28-5)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H302-H301-H314-H332
Precautionary statements  P261-P264-P270-P301+P312a-P304+P340-P501a-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  T
Risk Statements  20-25-34
Safety Statements  26-36/37/39-45
RIDADR  UN 1884 6.1/PG 3
WGK Germany  1
RTECS  CQ9800000
HazardClass  6.1
PackingGroup  III
HS Code  28164000

Barium oxide price More Price(8)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 288497 Barium oxide 97% 1304-28-5 50g $110 2021-03-22 Buy
Sigma-Aldrich 288497 Barium oxide 97% 1304-28-5 250g $416 2021-03-22 Buy
Alfa Aesar 044440 Barium oxide, 99.5% (metals basis excluding Sr), Sr <500ppm 1304-28-5 25g $191 2021-03-22 Buy
Alfa Aesar 044440 Barium oxide, 99.5% (metals basis excluding Sr), Sr <500ppm 1304-28-5 100g $684 2021-03-22 Buy
Strem Chemicals 93-5651 Barium oxide (99.5%-Ba) 1304-28-5 100g $522 2021-03-22 Buy

Barium oxide Chemical Properties,Uses,Production

Chemical Properties

Barium oxide is a white to yellowish-white, odorless powder.
Barium oxide
Barium oxide is an alkaline earth flux that melts at 3493°F (1923C).It's an active flux at high temperatures and forms a strong eutectic with boron that can cause even matte glazes to run. Barium oxide gives strong, vivid colors, especially with copper and cobalt. It produces excellent satin and matte surfaces from crystallization. This is worth noting because alumina(in the form of clay) is also used to create matte surfaces, but only produces dull colors. With barium oxide you get both matte surfaces and vivid colors. It's sometimes used in small amounts to produce iron blue celadons. Barium oxide has a high viscosity and medium surface tension so it produces stiff glazes,but it will cause running in glazes that are fired too hot as its fluxing power increases with temperature. It has a medium expansion and contrac- tion rate.
Although barium oxide isn't volatile at ceramic temperatures keep in mind that it's extremely toxic, especially as a carbonate powder, when it becomes an airborne health hazard during mixing,and certainly if it leaches from a fired glaze. It was once used as a rat poison, so handle barium compounds with caution.Barium glazes aren't suitable for functional ware. Under laboratory conditions (i.e.. in pure water) barium carbonate is almost insoluble in water, but in acidic solutions it can become soluble, making it easier to absorb into the skin.
Barium sulfate is insoluble and even has medical uses. It's sometimes used to provide a less toxic form of barium oxide in glazes and clay bodies(as in Wedgwood's Jasperware), but it does release sulfur fumes when fired.
Soluble sources of barium oxide are barium carbonate (almost insoluble), and some frits (slightly soluble); an insoluble source of barium oxide is barium sulfate.

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.
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.


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.


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.


Barium oxide is made by heating barium carbonate with coke, carbon black or tar:
BaCO3 + C→ BaO + 2CO

It may be also prepared by thermal decomposition of barium nitrate.


A barium-containing ore.


barium oxide: A white or yellowishsolid, BaO, obtained by heating bariumin oxygen or by the thermal decompositionof barium carbonate ornitrate; cubic; r.d. 5.72; m.p. 1923°C;b.p. 2000°C. When barium oxide isheated in oxygen the peroxide, BaO2,is formed in a reversible reactionthat was once used as a method forobtaining oxygen (the Brin process).Barium oxide is now used in themanufacture of lubricating-oil additives.

General Description

A white to yellow powder. May be toxic by ingestion. Irritates skin, eyes and mucous membranes. Used as a drying agent for gasoline and solvents.

Air & Water Reactions

Hygroscopic. Reacts readily and exothermically with water to form a solution of corrosive barium hydroxide [Merck 11th ed. 1989].

Reactivity Profile

BARIUM OXIDE reacts as a strong base. Combines exothermically with all categories of acids. Reacts with carbon dioxide to form barium carbonate [Merck 11th ed. 1989]. Ignites hydroxylamine on contact [Mellor 8:291 1946-47]. Mixtures with mercurous or nickel oxide react vigorously with hydrogen sulfide in air. Explosions may result [Mellor 10:140 1946-47]. Can react, particularly in the presence of moisture, with aluminum and zinc)to form oxides or hydroxides of the metal and generate gaseous hydrogen. May initiate polymerization reactions in polymerizable organic compounds, especially epoxides. May generate flammable and/or toxic gases with ammonium salts, nitrides, halogenated organics, peroxides, and hydroperoxides.


Toxic by ingestion. See barium.

Health Hazard

TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

Safety Profile

A poison via subcutaneous route. See also BARIUM COMPOUNDS (soluble). Combustible by spontaneous chemical reaction; produces heat on contact with water or steam. Reacts with H2O, Ba(OH)2. Incompatible with H2S, hydroxylamine, N2O4, triuranium octaoxide, so3.

Potential Exposure

It is used to dry gases and solvents and in producing detergents for lubricating oils.


UN1884 Barium oxide, Hazard Class: 6.1; Labels: 6.1—Poisonous materials.


Reacts with water, forming the strong base, barium hydroxide. Keep away from acids, hydrogen sulfide, carbon dioxide; hydroxylamine, nitrogen tetroxide; sulfur trioxide; since violent reactions occur. Reacts with triuranium. Never pour water into this chemical.

Barium oxide Preparation Products And Raw materials

Raw materials

Preparation Products

Barium oxide Suppliers

Global( 161)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-66670886 China 21022 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 22607 55
career henan chemical co
+86-371-86658258 CHINA 29959 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28229 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23035 58
Shandong chuangyingchemical Co., Ltd.
18853181302 CHINA 5917 58
Chongqing Chemdad Co., Ltd
+86-13650506873 CHINA 37282 58
86-18523575427 CHINA 47496 58
Xingtai Haoxun Import and Export Trade Co., Ltd.
+8617733977883 WhatsApp:+8617733976525
86-0319-5021664 CHINA 270 58
13806087780 +86 13806087780 CHINA 17607 58

View Lastest Price from Barium oxide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-08-26 BARIUM OXIDE
US $10.00 / KG 1KG 99.5% 5000kg Hebei Crovell Biotech Co Ltd
2021-08-23 Oxobarium
US $80.00 / KG 1KG 99% 50000kg Wuhan Shuokang Biological Technology Co.,Ltd
2021-08-02 Barium oxide
US $150.00 / KG 10g 99% 10 tons Xingtai Haoxun Import and Export Trade Co., Ltd.

Barium oxide Spectrum

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