... 4,Appearance : Brownish liquid · Chemical name : Ferric chloride solution· Molecular formula : FeCl3· Molecular weight : 162.21 ... : Brownish liquid1. Usage :Good substitute of solid ferric chloride. In photoengraving; photography; manufacture of other Fe salts ... % of cost compared with liquid/solid aluminum sulfate, polyaluminum chloride, polyferric sulfate. •Good flocculation property, with faster ...