Nov 14, 2016 · according to the report, boric acid is the second largest borate derivative by volume, borax being the first. the demand for boric acid is on a rise over the past few years due to new applications of boric acid, such as its substitution over other minerals. china and the us are the largest consumers of boric acid. Optibor boric acids can be used in combination with a sodium borate (borax pentahydrate or anhydrous borax) to adjust the sodium-to-boron ratio in glasses that require low sodium levels. Where to buy boric acid in the usa. we have compiled a list of boric acid suppliers in the usa, the companies listed have a genuine united states presence and include: manufacturers, distributors, wholesalers, industrial, retail and bulk suppliers. ... borax; search terms. American borate offers a variety of boric acid, including epa registered material, (10043-35-3) as one of our boron products in standard & specialty packaging.