In industrial application, Ferric chloride is used in sewage treatment and drinking water production.
It is also used as a leaching agent in chloride hydrometallurgy, for example in the production of Si from FeSi. (Silgrain process)
Ferric chloride is used as catalyst for the reaction of ethylene with chlorine, forming ethylene dichloride, an important commodity chemical, which is mainly used for the industrial production of vinyl chloride, the monomer for making PVC
Used in Laboratory.
Used in anhydrous form as a drying reagent in certain reactions.
Used to detect the presence of phenol compounds in organic synthesis e.g.: examining purity of synthesised Aspirin.
Used in water and wastewater treatment to precipitate phosphate as iron(III) phosphate.
Necessary for the etching of photogravure plates for printing photographic and fine art images in intaglio and for etching rotogravure cylinders used in the printing industry.
Used to make printed circuit boards (PCBs).
Used to test the pitting and crevice corrosion resistance of stainless steels and other alloys.