... .101, PR101, Color Index 77491, Pigment Red 102, P.R.102, PR102, Fe2O3, Ferric oxide, Iron (III) Oxide Anhydrous2.C.I. Number: 77491CAS Number ... 514MIO 4MIO 2F4. Application: As an important inorganic colorant, iron oxide red is characterized high opacity, strong tinting strength, easy dispersibility, excellent ...