It can be used to manufacture ceramics, enamel, refractory crucible and refractory brick, and can also be used as polishing agent, adhesive, filler of paint and paper, accelerator and activator of neoprene and fluororubber. After mixing with magnesium chloride and other solutions, magnesium oxide cement can be prepared. In medicine, it is used as antacid and laxative, for excessive gastric acid, gastric and duodenal ulcer, and also for glass, dye, phenolic plastics and other industries. Food grade is used as decolorizing agent for refining granulated sugar, pH regulator for ice cream powder, etc.