Silica flour or quartz Sio2(silicon dioxide) 99.69% Fe2o3(iron oxide) 0.025% Al2o3(aluminum oxide) 0.200% Cao(calcium oxide) 0.025% Mgo(magnesium oxide) 0.005% Tio2(titanium dioxide) 0.060% Na2o(sodium oxide) 0.030% K2o(potassium oxide) 0.013% L.O.I.(loss of ignition) 0.260% 25 kg. Hdep bags 50 kg. Hdep bags 1 mt jumbo bags