Concentrated power, easy conveyance

With lower transportation, handling, and storage costs, this concentrated sodium borate is used in a variety of industries including glass and fiberglass, cleaning products, and flame retardants.
Benefits of boron in insulation

Reduced Costs—Increased Benefits

Neobor®, the most common form of sodium borate used in industry, offers low transportation, handling, and storage costs thanks to its concentrated form. Stable under ordinary conditions, free-flowing, and easily handled by air or mechanical conveying, Neobor puts the benefits of boron within easy reach for multiple industries.


Neobor is a source of 20 Mule Team® Borax boric oxide (B2O3) in many compositions, including both insulation and textile fiberglass, borosilicate glass, ceramics, cleaners, and adhesives. It is also a source of sodium.


Neobor acts as both flux and network former, controlling glass melt and strengthening the final product. Because Neobor provides a low coefficient of thermal expansion, the glass becomes resistant to heat, thermal shock, and chemicals. It can also be combined with boric acid to control the sodium-to-boron ratio in certain glasses. In fiberglass, Neobor assists the “fiberizing” of the material and promotes durability.

Ceramics and enamels

Neobor also 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, Neobor facilitates the thermal fit between the glazeand ceramic body. It also reduces melting temperatures, inhibits devitrification, and provides a smooth, even finish.

Laundry detergents

Neobor is used in the manufacture of sodium perborate, the principal bleaching agent in laundry powders. In liquid detergents, it stabilizes enzymes; Neobor is incorporated in many cleaning products as a pH buffering agent and acts as a water softener in the wash solution. It assists in soil removal, the emulsification of oils, and as a gentle abrasive. When combined with polyhydroxyl compounds, Neobor can be used for viscosity control and is often 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, waxes, and industrial or institutional cleaning compounds.

Flame retardancy

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

Aqueous systems

Neobor is incorporated in many aqueous systems as a pH buffer and to inhibit corrosion. It protects ferrous metals against oxidation and is used in the manufacture of automotive antifreeze, water treatment chemicals, and metal-working fluids.

Starch adhesives

This product is used in starch adhesives for corrugated paper and paperboard and as a cross-linking agent in the manufacture of casein-and dextrin-based adhesives. Neobor greatly improves the tack and green strength of the adhesive by cross-linking conjugated hydroxyl groups.

And, more

Neobor is also used as a:

  • Lubricant carrier in wire drawing
  • Stabilizer and bonding agent in refractories
  • Cover flux in metallurgy
  • Set retardant in cements and concrete
  • Wax emulsifier

Neobor pentahydrate borax is a low-cost alternative for use in glazes, where it can help prevent crazing and bubbling (pinholing) of the glaze.


Available Grades

Dissolved in water, Neobor TG hydrolyzes to create a mildly alkaline solution capable of neutralizing acids. It also combines with strong alkalis to form compounds of a lower pH. The relatively constant pH of Neobor solutions makes it an excellent buffering agent.

By reducing glass viscosity, the addition of Neobor TG progressively lowers both the melting and fiberizing temperatures of insulation fiberglass. By increasing aqueous durability, it improves the insulation’s resistance to atmospheric corrosion.

Neobor TG’s sieve specification is U.S. sieve No. 8, with a mesh size of 2.36 mm and a retained guarantee of ≤ 1.0%.


Chemical and Physical Properties

Molecular weight: 291.30

Melting point: 743°C

Specific gravity: 1.88

Appearance: white crystalline granules or powder

Solubility: 4.53% by weight in saturated solution (water) at room temperature; other solutions (methanol, propylene glycol) in data sheet

Stability: Neobor TG is a stable crystalline product that does not change chemically under normal storage conditions. If wetted, it reacts exothermically with the water, forming borax decahydrate. Prevent exposure of the product to moisture and avoid wide fluctuations in temperature and humidity, which can also cause the product to cake. Maintain the integrity of the packaging to help avoid these issues.

Bulk density: 60 lb/ft3 (952 kg/m3)

Angle of repose: 35°

Chemical Composition (Theoretical)

Boric oxide, B2O3: 47.80%

Sodium oxide, Na2O: 21.28%

Water of crystallization, H2O: 30.92%

Anhydrous equivalent: 69.08%

Containers: Products may be available in bulk, IBCs, or small bags

Neobor in Action 

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U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 500 customers with more than 1,700 delivery locations globally. We supply 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles northeast of Los Angeles.  Learn more about Rio Tinto.

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