Boron Oxide

MGCP Boron Oxide

We offer quality Boron Oxide at competitive rates. Our Boron and Borax products undergo quite a careful selection and multiprocessing to ensure exclusiveness and quality which can be mapped through the last industrial product and application it will be used in.

For a regular consumer and all concerned, following properties and technical fact-sheet about Boron Oxide would be helpful.

Property / Paremeter Value / Description
Molecular formula B2O3
Molar Mass 69.6182 g/Mol
Appearance White-Glassy Crystalline Solid, Off ash which in Powder form
Density 2.4~2.6 gm/CC
Melting Point 510 °C
Boiling Point 1860 °C
Soluability in Water 22 gm/Liter

Boron Oxide, the pure form of B2O3, is a hard glassy material, granular in texture. Exposed to the atmosphere it slowly absorbs water, reverting to boric acid. It is soluble in water but at a much slower rate than boric acid. Boron Oxide is used where B2O3 is required without the presence of sodium or calcium and/or where water would be detrimental to the process.

Chemical Specifications

Analyte Guarantee
B2O3 % 80.00
SO4 ppm ≤250
Cl ppm ≤10
Fe ppm ≤10

Sieve Specifications

Grade ASTM Mesh Size in micron % Retained Guarantee
Granular 20 850 ≤2
Normal Powder 100 150 ≤5
Fine Powder 200 75 ≤10


Specialty glasses

Pure B2O3 is needed for the production of certain types of glasses including optical and telescope lenses, medical glasses (ampoules), electronic glasses and glass-ceramic composites. The general benefits of using B2O3 in glass formulations are reduction of melting temperature, increased thermal resistance and mechanical strength, and enhanced aqueous and chemical durability.

Specialty ceramics

Boron Oxide is used to produce various types of high strength and heat-resistant ceramic products such as boron carbide, boron nitride, titanium and zirconium diborides, as well as elemental boron.


It is used in the manufacture of chemically bonded firebricks and castables which require resistance to high temperature, abrasion and corrosion. Boron Oxide is used as a binder for magnesia-based refractory bricks and as a stabilizer for dolomite refractory bricks commonly used in steel smelting furnaces.

Glazes and enamels

Boron Oxide increases the strength, scratch resistance, and chemical resistance of ceramic wares such as wall and floor tiles, tableware and porcelain, and of enamelled appliances. Generally, Boron Oxide which has a capacity to increase yields is used for a combination of reasons, the final glaze or enamel benefiting from its influence on both the melting and physical properties of the product.

Chemical reactions

Boron Oxide is used in the preparation of boron halides, sodium borohydride, metallic borates, and borate esters. It is also used as a catalyst in the conversion and synthesis of many organic compounds.


Boron Oxide is an excellent solvent for metallic oxides at high temperatures. In the field of metallurgy, Boron Oxide is used in the preparation of special welding and soldering fluxes, in chemical-bonded refractories, in the hardening of steel, and in the production of alloys with iron, nickel or manganese. It is also used to produce amorphous metal and rare-earth magnets.