Iron Oxide Spec: Iron Oxide Red 130 Fe2O3 % :Min 96 105°C Moisture % :Max 1.0 Water soluble salts % : Max0.3 Residue on 45um % : Max0.2 PH-value : 3.5-8 Oil absorption :15-25 Tinting strength % : 95-105 Density approx / cm3 : 0.7-1.1