Canada, major salt deposits

This is a colorless crystalline substance (chemical formula NajBjO,. 10 HjO) found in major quantity in the salt deposits of California, Chile, Tibet, Pern, and Canada. Sodium borate wtis once extensively used as a chemical food preservative, but in many countries, including the United States, its use for this purpose was discarded when it was shown to be potentially toxic in the amounts used. 

Potassium occurs widely in the earth s crust and comprises 2.6% of the mineral material it is seventh in abundance [7]. Potassium is too reactive to occur as the metal and its extraction is a major industry. The most conunon minerals for extraction are silvite, camallite, and langbeinite. The world consumption of potassium salts is about 18 x 10 tons annually the largest deposit is in Saskatchewan in Canada (10 tons of KCl). 

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