... to 66% Size and packing at buyers' option. Brucite can be used in metallurgy, building materials, environment protection ... , plastic, cable, etc. The flame retardant made from brucite has excellent performances such as: high filling, good flame ... of secondary pollution caused by fire. Name:Raw Brucite Powder magnesium powderGradeMgO(min.)SiO2(max.)CaO(max.)Fe2O3 ... %0.500.33%30.50%90.00% White Magnesium