U.S. Borax Company and History

How long has U.S. Borax been in business?
In 1872, borate deposits were discovered in California’s Death Valley. Several companies sprung up in the region to mine borates. By 1890, they were mostly consolidated into the Pacific Coast Borax Company. In 1956, the Pacific Borax Company merged with the United States Potash Corporation to form U.S. Borax.

Learn more about the history of U.S. Borax.
Is U.S. Borax an independent company?
Rio Tinto logoU.S. Borax was acquired by Rio Tinto in 1967. The new group, sometimes referred to as Rio Tinto Borax or Rio Tinto Borates, is a wholly owned subsidiary of Rio Tinto Group.
Is U.S. Borax ISO certified?
All of our sites are certified to ISO 9001:2008 Quality Management Systems standards.
Where do you get the borates you use in your products?
Boron operations mine and facilityWe operate California’s largest open pit mine in Boron, California.
Can I visit the U.S. Borax mine?
Borax Visitor CenterThe mine in Boron, California is closed to the general public. But, the Borax Visitor Center is open (and free to visit), seven days a week, excluding major U.S. holidays. Learn more about the Borax Visitor Center and plan your visit.
Can I buy products directly from U.S. Borax?
U.S. Borax produces and sells bulk borates; we do not sell any consumer borate products.

To buy our borate products in bulk, please contact your local sales representative for more information about purchasing our industrial and agriculture products through us or one of our distributors.
What does U.S. Borax do to protect people from possible risk?
All our operations comply with all applicable safety regulations and make safety training a priority. Learn more about our commitment to keep our workplaces safe.
Are you hiring? Where can I apply to work for U.S. Borax?
As a division of Rio Tinto, U.S. Borax has a number of positions if you are looking for a career that makes a difference. Learn more about joining the U.S. Borax team.

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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