MgO 65%min. Moh's hardness 2.5 Color white, gray, light kelly Whiteness 80%~85% Decomposition temperature 340 centi degree Properties:MgO 65%min. Moh's hardness 2.5 color white whiteness 80%~85% decomposition temperature 340 centi degree specific gravity 2.4Application:Functional flame-retardant filler, welding electrodes coating, artificial fiber, rubber, plastic and glass fiber reinforced ...