F 1275 (OTTO) Ferric acetyl acetonate, 99% Cas no 14024-18-1 - used in Grignard reactions with acid chlorides to give ketones. F 1275 (OTTO) Ferric acetyl acetonate, 99% Cas no 14024-18-1 - used as a precatalyst and reagent in organic chemistry. It acts as a precursor for highly crystalline (Zn, Fe)Fe2O4.