... 3.Molecular Formula: Fe2O3 4.Red powder Iron oxide red /yellow /black Characters:Molecular Formula: Fe2O3CAS No. :1332-37-2Packing:25KG/PP ... cement to color up various indoor and outdoor cement surfaces, i.e. walls, terraces, ceilings, pillars, corridors, roads, car-park, ... , etc, as well as various building ceramic and glazed ceramics, i.e. facing bricks, floor tiles, roofing tiles, panels, terrazzo, ...