... , CAS No.: 1309-37-1 Relative molecular weight: The HNKW Iron Oxide Red has a high quality and a competitive priceIron ... Oxide RedColor Index: Pigment red 101 (77491)Chemical Formula: Fe2O3,CAS ... ,110,120,130A,130B,130S,130P,230,140,180,190PropertyIron Oxide RedDensity5.24g/cm3Chroma(Standard comparison)SimilarFe2O3(min)95Water %1.0Fineness ...