... process magnesium hydroxide flame retardant both physical & chemical. Mg(OH)2, totally name magnesium hydroxide, good filler for many industry. XNXNR ... , DV50:15um, 45um 98% passing through, L.O.I:30.2%, MgO:64%, H2O:33%, Fe2O3:0.3%, SiO2:4.0%. ...