Iron Oxide Yellow Chemical Formula: FeOOH Color Index: Pigment yellow 42 CAS No.: 20344-49-4 Basic types: 311,313,586,810 CHEMICAL AND PHYSICAL ANALYSIS Fe as Fe2O3≥86.0% Test method ISO1248 Matter volatile at 105OC≤1.0% Test method ISO787-2 Water soluble matter≤0.3% Test method ISO787-3 pH value3.5 ~7 Test method ISO787-9 Residue on 320mesh≤0.3% Test method ISO787-7 Oil absorption25~35g/100g Test method ISO787-5 Tinting Strength (Compared with Standard) 95~ 105% Test method ISO787-24