CAS No.: 1309-37-1 Molecular formula: Fe2O3 Molecule Weight: 159.69 UN Code: 1376 Appearance: Red Powder. Specification: SHADE Similar STRENGTH 1.0 MOISTURE AT 105degree 99.2% OIL ABSORPTION 15%—25% Fe2O3 (%) 96 % RESLDUE(320) 0.5% SOLUBLE IN WATER 0.3% pH 5- 7 Usage: Construction, Coating and Paint, Ink, Rubber, Plastic, etc.