Iron oxide black is one cheap,good quality product application for paint,cement,rubber and so on. Iron Oxide BlackChemical Formula: Fe3O4, Color Index: Pigment black 11CAS No.: 1317-61-9 Basic types: 318,330,740,750Full ShadeZnO Reduction (1:10)Full ShadeZnO Reduction (1:10)318318 330330740740750750 Iron oxide black