150 years of innovation from U.S. Borax

High-quality refined borates made in America


Refined and specialty borates for every industry and application

For a century and a half, U.S. Borax has provided refined borates vital to industrial processes and agricultural and commercial applications. Mined and made in America, our products set the global standard for quality and purity, ensuring the best performance in every process.

U.S. Borax technical and scientific experts are dedicated to continuous research and product improvement. In collaboration with industry, education, and community leaders, we constantly explore new ways to optimize boron’s unique properties in your existing applications—and your future innovations.

Why Choose Us?

Better quality boron, better results

In every industrial process, quality inputs matter. U.S. Borax continually monitors and improves product quality at every stage, from our exacting refinement process to product finishing, packaging, and shipping. Every product is meticulously sampled, tested, and documented. The result is refined and specialty borates that are consistent, high-performing, cost-effective, and reliably free of impurities. Quality is top of mind—from our mine to you.

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Of the world's boron supply


Countries served


Tons of product refined annually


Product brands

Global expertise, global reach

The experts at U.S. Borax are dedicated to customer service. Whether you need scientific assistance with a formulation, technical support for your application, or just-in-time delivery anywhere in the world, our experts are here to partner with you every step of the way.

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U.S. Borax insights

Boron: Key to healthy crops on a changing planet
For a century, we've known that boron is an essential nutrient for plants. But what we’ve recently learned is that boron can play a key role in aidi... Read More
U.S. Borax becomes first open pit mine to transition to renewable diesel
Rio Tinto has successfully completed the full transition of its heavy machinery from fossil diesel to renewable diesel at its Boron, California operation, mak... Learn More
Boron in Solar Energy: Powering Efficiency
Solar power offers exciting potential as a clean and endless energy source. Yet scaling it will require more efficient and durable products for harnessing the... Read 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

U.S. Borax operations

Committed to cutting-edge research, safety, sustainability, and innovation, U.S. Borax operations support our customers and the communities where we operate.

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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

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Visiting the U.S. Borax mine

Each year, hundreds of visitors travel deep into the Mojave Desert to explore the U.S. Borax Visitor Center—and one of the richest boron deposits on Earth.

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Have questions about our refined borate products, our boron research, or your order? We have answers.

How Boron Improves Your Life

Boron’s versatile properties enhance numerous products and applications that are essential to contemporary living. From agriculture to transportation to technology, discover how boron makes the world a better place—and how U.S. Borax is finding better ways to deliver this essential element.

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 650 customers with more than 1,800 delivery locations globally. We supply around 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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