Mg(OH)2: the factory use good quality brucite ore to process magnesium hydroxide flame retardant both physical & chemical. Mg(OH)2, totally name magnesium hydroxide, good filler for many industry. XNXNR-4, whiteness:92%, specific area:2000, density:2.8, DV50:15um, 45um 98% passing through, L.O.I:30.2%, MgO:64%, H2O:33%, Fe2O3:0.3%, SiO2:4.0%. More information,please contact with us.