Uncommon
Iron(III) chloride
Inorganic compound of Iron
Iron(III) chloride
Iron(III) chloride, also called ferric chloride, is an inorganic compound with the formula FeCl3. It forms hydrates FeCl3·xH2O. These compounds are some of the most important and commonplace compounds of iron. They are available both in anhydrous and in hydrated forms, which are both hygroscopic. They feature iron in its +3 oxidation state. The anhydrous derivative is a Lewis acid, while all forms are mild oxidizing agents. It is used as a water cleaner and as an etchant for metals.
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