Ferric chloride describes the inorganic compounds with the formula FeCl3(H2O)x. Also called ferric chloride, 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.
Ferric chloride solution (FeCl₃), especially at a 40% concentration, is widely used in various industries due to its strong coagulating, etching, and oxidizing properties. Here are some industries where ferric chloride solution is commonly applied:
The main roles of ferric chloride solution are to act as a coagulant, etching agent, or catalyst, and its applications vary widely based on its chemical properties. Safety precautions are necessary when handling ferric chloride due to its corrosive nature.
CAS Number | 7705-08-0 check |
Chemical formula | FeCl3 |
Molar mass | 162.204 g/mol (anhydrous) |
270.295 g/mol (hexahydrate)[1] | |
Appearance | Green-black by reflected light; purple-red by transmitted light; yellow solid as hexahydrate; brown as aqueous solution |
Odor | Slight HCl |
Density | 2.90 g/cm3 (anhydrous) |
1.82 g/cm3 (hexahydrate)[1] | |
Melting point | 307.6 °C (585.7 °F; 580.8 K) (anhydrous) |
37 °C (99 °F; 310 K) (hexahydrate)[1] | |
Boiling point | 316 °C (601 °F; 589 K) (anhydrous, decomposes)[1] |
280 °C (536 °F; 553 K) (hexahydrate, decomposes) | |
Solubility in water | 912 g/L (anhydrous or hexahydrate, 25 °C)[1] |
Solubility in |
|
Acetone | 630 g/L (18 °C) |
Methanol | Highly soluble |
Ethanol | 830 g/L |
Diethyl ether[1] | Highly soluble |
Magnetic susceptibility (χ) | +13,450·10−6 cm3/mol[2] |
Viscosity | 12 cP (40% solution) |
Available Packing
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