Synthetic Black Iron Oxides from Cathay Industries are high-quality inorganic color pigments suitable for a wide range of demanding colorant applications. Typical applications include masonry block, bricks, paving slabs, brick pavers, architectural, readymix concrete, roof tiles, sand/lime bricks and walling blocks. Colors range from weak black oxide F9000, to strong black iron oxide F9550. As with all Cathay Industries products the Synthetic Black Iron Oxides are produced to strict quality tolerances. Our products yield reliable performance properties which offer outstanding light fastness, opacity, chemical resistance, heat stability, exterior durability and compatibility. Properties Description Appearance Black Powder Chemical Composition Fe3O4 Particle Shape Cubic Pigment Index Black 11 Color Index 77499 CAS No. 1317-61-9