Linear Formula: FeCl3, Molecular Weight: 162.20, reagent grade, 97%, Synonym: Ferric chloride, Iron trichloride, Molysite. Iron(III) chloride is a mild oxidizing agent and participates in various carbon-carbon-bond forming reactions. On crystallization with water, it forms hydrates. It can be prepared by reacting chlorine with the scrap iron at approximately 650°C.