Color Index: Pigment red 101 (77491) Chemical Formula: Fe2O3, 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 No.: 1309-37-1 Relative molecular weight: 159.69Other namesIndian redcalcotharBasic types: Y101,110,120,130A,130B,130S,130P,230,140,180, ...