Description Iron(III) Oxide Monohydate, 99.9% (Metals Basis), 250g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Yellow Appearance (Form) Powder Purity (Metals Basis) 99.9% Identity by ICP Analysis CAS: 51247-00-1 FORMULA: Fe2O3·H2O