Description Ferric Ammonium Oxalate, 99+%, 500g For Research & Development Not for drug, human, animal, or food use Specifications: Assay 99+%Iron (Fe) 12.5-13.4% pH 4.2-5.5 CAS: 13268-42-3 FORMULA: (NH4)3[Fe(C2O4)3] · 3H2O