Item Iron oxide red 130 Iron oxide red 190 Iron oxide brown 610 Iron oxide black 780 Iron oxide yellow 313 Iron oxide blue. Fe2o3/fe3o4f¦% 96 95 92 93 86. 105fpc moisture fn% 1.0 1.0 1.0 1.0 1.0 1.0. Water soluble salts fn% 0.3 0.3 0.5 0.5 0.3 0.5. Residue on 45um fn% 0.2 0.20 0.30 0.3 0.3 0.3. Ph-value 3.5-8 3.5-8 4-7 5-8 3.5-7. Oil absorption 15-25 15-25 20-30 12-25 25-35. Tinting strength % 95-105 95-105 95-105 95-105 95-105 95-105. Density approx / cm3 5.0-5.1 5.0-5.1 4.8 4.5-5.0 4.0-4.3. Appearance Red, yellow, blue, brown, black, green powder. Usage Construction, coating and paint, ink, rubber, plastic, etc. Packing 25kg net bag, 23mt in 20f+fcl.