Cas number: 1309-37-1/1317-61-9 Molecular formula:Fe2O3/Fe3O4 Molecular weight : 159.69 /231.533 Appearance: Colored powder. Its quality is stable with fine decentralization, strong tinting strength. Application: 1. Construction, Coating & Paint, Ink, Rubber, Plastic, etc. 2. Tinting of rubber, plactic product, scagliola, wall, terrazzo. 3. Raw material of the chemical product contain iron such as oil paint, concoctive paint. Packaging: Net weight 25kg in layers brown paper , or knitting bag outside and plastic bag inside , 20MT in the 20'FCL(Iron Oxide Red/Black/Green/Brown/Blue);13MT in the 20'FCL(Iron Oxide Yellow).