Item Silica Flour Application abrasive in polishes and cleaning products; an additive in soaps, toothpastes, paints; reinforcing filler in rubber, plastics, paper, wood fillers, Specification SiO2 99.2% Al2O3 0.30% Fe2O3 0.04% TiO2 0.02% CaO 0.05% MgO 0.01% K2O 0.01% Na2O 0.01% Color white