Borax (from Arabic beetroot - saltpeter), sodium tetraborate, Na2B4O7 - 10H2O, crystalline hydrate of the sodium salt of tetraboric acid. In nature, it occurs in the form of a mineral - borax (or tinkal), white, less often gray and yellow; density 1690-1720 kg / m3 (see. Natural borates). B. is s..
Boric acid (orthoboric acid) is a weak acid with the chemical formula H3BO3. Colorless crystalline substance in the form of odorless flakes, has a layered triclinic lattice, in which acid molecules are hydrogen-bonded into flat layers, the layers are intermolecularly linked (d = 0.318 nm). ..