... 25kg / Bag 4.20MT / 20'FCL 5.Iron Oxide Red Iron Oxide Red 190 CAS No: 1309-37-1 Molecular Formula: Fe2O3 ... 2) Used for dyeing construction materials, such as mosaic bricks, for concrete bricks, pavement, colorful tiles, roofing tiles and man-made marble ... Formula: Fe2O3·αH2O As an important inorganic colorant, iron oxide red is characterized high opacity, strong tinting strength, easy dispersibility, ...