U.S. Borax: Pioneering the elements of modern living

Refined Boron: Essential. Every day. Everywhere.

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Our goal is to improve your quality of life.

We have a nearly 150-year tradition of innovation and a responsible approach to mining, refining, and transforming boron into products that are essential to modern living. From the food on your table to the house you live in to the car you drive and the energy that powers it all—boron is an elemental part of human life and human progress.

Find out how refined boron shapes the way we live today—and the places we’ll go tomorrow.

Borax powder - Food


Through technical innovation and support for global research, borates help farmers around the world more efficiently grow better crops in greater quantities—while protecting the land and those who farm it.

Learn more about how we feed a hungry planet ›
Go directly to the U.S. Borax agriculture website ›

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Borates play an important role in modern urbanization through innovative products that support sustainable development, increased human safety, and technological advances.

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Borax powder


Whether from renewable or traditional sources, borates increase the efficiency and safety of energy production. Our products also help to reduce and optimize energy consumption.

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20 Mule Team Borax Products

Learn more about 20 Mule Team® Borax products

Ammonium Pentaborate

Whether inhibiting heat, flame, or corrosion, the purity of this alkaline salt makes it an excellent choice. Learn More


This refined U.S. Borax product is made from the dehydration and fusion of borax. Depending on the grade, Anhybor can be used to produce boron-enriched compou... Learn More

Borax Decahydrate

From detergents to dyes to adhesives, this mild alkaline salt does it all, particularly excelling as a buffering and fluxing agent. Learn More

Boric Oxide

Pure anhydrous form is ideal where boric acid is required without metals. A powerful tool in the production of specialty glasses, ceramics, enamels, and fluxes. Learn More

Borogard ZB

Protect wood and wood composites from destroying organisms, rot decay fungi, and subterranean termites. Learn More


This hard, glassy, granular product is excellent when forming flux or glass, where it helps to increase yield and reduce energy consumption. Learn More


Fertibor is the optimum product for suspension in liquid fertilizers and offers easy handling, superior flow, and consistency. Learn More


These products are unique zinc borates combining the best of zinc and boron oxides that can be used to develop fire-retardant formulations. Learn More


Granubor is engineered to meet crops’ boron demands when they need it most—during the growing season. Learn More


With lower transportation, handling, and storage costs, this concentrated sodium borate is used in glass, fiberglass, cleaning products, and flame retardants. Learn More

Optibor boric acid

From reducing melting temperatures in fiberglass production to inhibiting corrosion in fuel additives, Optibor has a multitude of uses in numerous industries. Learn More


Polybor earns its spot in industrial cleaning compounds, fire retardants, and the manufacture of water-treatment chemicals. Learn More

Potassium Pentaborate

Unique capabilities make it ideal for the automotive industry, where its addition to gear lubricants improve load-carrying capacity and wear protection. Learn More

Potassium Tetraborate

An excellent buffering agent, potassium tetraborate can lower the pH of strong alkalis and is also used in welding, soldering, and brazing fluxes. Learn More

Sodium Metaborate

Provides increased viscosity, quicker tack, and better fluidity in starch and dextrin adhesives. Helps stabilize hydrogen peroxide solutions and neutralize ac... Learn More

Sodium Pentaborate

Used primarily in oilfield drilling, sodium pentaborate provides lubrication and stabilization in wells and downhole drilling. Learn More


Used for foliar fertilizer applications: Formulated to disperse quickly in liquid, leave minimal residue, and provide an economical boron source. Learn More


This industrial, high-performance wood preservative is ideal for protecting rafters, cladding, and joinery against insects and decay. Learn More


Because zinc and boron deficiency are widespread around the world, a product with both nutrients is a good fit in many regions. Zincubor brings these two impo... Learn More


When it comes to particulate materials, particle size affects end product quality and properties. U.S. Borax offers many of its products in powder grade. Learn More

Looking for 20 Mule Team Borax Laundry Detergent Booster?
The Dial Corporation acquired U.S. Borax’s consumer products division in 1988. Subsequently, Henkel acquired Dial in 2003. Visit the 20 Mule Team Laundry website to find out more.

Visit 20 Mule Team Laundry


Ignition Automation Project Wins Safety Award
Our team began a project to upgrade the ignition system of our furnace’s forehearth burners. The project was such a first-class example of teamwork that... Learn More
Boron: Helping feed the world
Agriculture needs to become increasingly efficient to feed a growing population. As an essential element for crop growth, boron has a vital role to play. Watch video
Working on the Railroad: Borates Protect Wood Crossties for Safety and Sustainability
The North American rail system runs on top of millions of wooden crossties. Borates provide wood protection that increases the service life, safety, and susta... Learn More
U.S. Borax Operations

Living and Working in Kern County

For more than 150 years, U.S. Borax has called Boron, California, home. Discover why we love it here.Read More

Careers at U.S. Borax

Looking for a career that matters with a company that cares? Learn about working for U.S. Borax, see which positions are available, and discover how to apply.Read More

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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