Borax Pentahydrate

MGCP Borax Pentahydrate

Borax Pentahydrate is the most common form of sodium borate used in industry. Consisting of white crystalline granules or powder it is mildly alkaline in solution. The advantages of Borax Pentahydrate compared with borax Pentahydrate lie in the lower transportation, handling and storage costs of a more concentrated product. Borax Pentahydrate is stable under ordinary conditions, free-flowing, and easily handled by air or mechanical conveying.

Glasses and fiber glass
Borax Pentahydrate serves as a source of Boron Oxide(B2O3) in many compositions, including insulation fiber glass, textile fiber glass and borosilicate glasses (heat resistant, illumination, cookware, medical/cosmetic containers, hollow/solid microspheres, optical lenses and sealing glass). It also provides a source of sodium, and is used in combination with boric acid where it is necessary to control the sodium to boron ratio in the glass.

The function of B2O3 in glass making is that of both flux and network former. It controls the melt and influences the final product properties.

In fiber glass, B2O3 assists “fiberizing” and gives durability in use. In borosilicate glasses, it gives a low coefficient of thermal expansion (thus providing resistance to heat and thermal shock), and improves chemical durability.

Glazes and enamels

Borax Pentahydrate increases the strength, scratch resistance, and chemical resistance of ceramic wares such as wall and floor tiles, tableware and porcelain, and of enameled appliances. By controlling the coefficient of expansion, B2O3 facilitates thermal fit between glaze and body; it also reduces melting temperatures, inhibits devitrification, and provides for a smooth, even finish.

Detergents and bleach

Borax Pentahydrate is used in the manufacture of sodium perborate, the principal bleaching agent in laundry powders. It also acts as a water softener and pH buffer, in the wash solution, and assists in soil removal. In liquid detergents it stabilizes enzymes.

Cleaning products

Borax Pentahydrate is incorporated in many cleaning products as a pH buffering agent, to aid in the emulsification of oils, and as a gentle abrasive. When combined with polyhydroxyl compounds,

Borax Pentahydrate can be used for viscosity control. Borax Pentahydrate is added to formulations to clean hard surfaces such as metals, glass and toilet bowls. It is also used as an additive in hand cleaners, polishes and waxes and industrial/institutional cleaning compounds.

Flame retardancy

Borates change the oxidation reactions in the combustion of cellulosic materials to cause the formation of carbon residue. This char acts as a barrier to combustion and diverts the decomposition products that would otherwise smolder. Borax Pentahydrate, in combination with boric acid, is particularly effective in reducing the flammability of cellulosic materials.

Corrosion inhibition

Borax Pentahydrate is incorporated in many aqueous systems requiring corrosion inhibition. It protects ferrous metals against oxidation and finds use in the manufacture of automotive anti-freeze formulations, water treatment chemicals, and metal-working fluids.


Borax Pentahydrate is part of the starch adhesive formulation for corrugated paper and paperboard, and is a peptizing agent in the manufacture of casein-based and dextrin- based adhesives. Borax Pentahydrate greatly improves the tack and green strength of the adhesive by crosslinking conjugated hydroxyl groups.

Some other applications

Borax Pentahydrate is used as a lubricant carrier in wire drawing; stabilizer and bonding agent in refractories, cover flux in metallurgy, set retardant in cements and concrete, pH buffer in aqueous solutions, and as a wax emulsifier.