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Iron oxide pigment powders is chemical compounds composed with formula Fe3O4. Synthetic black iron oxide is the common colorant in concrete and cement paint. It is an color inorganicpigment, with chemical stability, strong color strength, fine dispersion and excellent light resistance, weather resistance, widely used in paint, building materials, with a wide range of market space.Iron oxide black is an important inorganic syntheic black pigment powder, hchemical stability,with high hiding power,strong color strength,good dispersion and excellent lightfast,weather resistance.It is widely used in construction industry,paint processing and plastic.