Magnesium carbonate Magnesium carbonate is white monotonic crystal or amorphous powderú¼non-toxic, tasteless . The relative density of light magnesium carbonate is small, the texture is light and soft, it can be used for the excellent filler. Because of it have the nature of non-burning and the texture is light and soft, it can produce fireproof material and heat preservation material that is heat insulation and high temperature resistance 20kg/bag (pp/pe bag)