Boric acid
…any oxyacid of boron, such as metaboric acid HBO2 and tetraboric acid H2B4O7. Orthoboric acid was first prepared by Wilhelm Homberg (1652–1715) from borax, by the action of mineral acids, and was given the name sal sedativum Hombergi ("sedative salt of Homberg"). However, boric acid and borates have been…