SECTION VI - PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES > CHAPTER 28 - INORGANIC CHEMICALS; ORGANIC OR INORGANIC COMPOUNDS OF PRECIOUS METALS, OF RARE-EARTH METALS, OF RADIOACTIVE ELEMENTS OR OF ISOTOPES > IV. INORGANIC BASES AND OXIDES, HYDROXIDES AND PEROXIDES OF METALS > 2816 Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium > Oxides, hydroxides and peroxides, of strontium or barium