Magnesium Bromate, Mg(BrO₃)₂

Magnesium Bromate, Mg(BrO₃)₂.6H₂O, occurs in colourless, efflorescent, regular octahedra. It dissolves in 1.4 parts of water, melts in its own water, and is dehydrated by heating to 200° C. Above that temperature it decomposes into magnesium oxide, bromine, and oxygen. It is prepared by dissolving magnesium oxide or carbonate in bromic acid, or by heating magnesium fluosilicate with potassium bromate. It is also produced, along with hypobromite, during the electrolysis of potassium bromide solution.