Ammonium iron(III) oxalate trihydrate, min. 99 %, pure, Molar mass (M) 428,06 g/mol, Density (D) 1,78 g/cm³, CAS No. [13268-42-3], EG-Nr. 220-952-2, Empirical formula (NH4)3Fe(C2O4)3 · 3 H2O