Ferric chloride, also known as iron(III) chloride, is a chemical compound with the formula FeCl3. It appears as a dark brown or yellowish solid and is highly soluble in water. Ferric chloride is commonly used in water treatment processes to remove impurities and in the production of pigments and dyes. In addition to its industrial applications, ferric chloride serves as a coagulant in sewage treatment and is utilized in the etching of metals in the electronics industry. It can also be used in laboratories for various chemical reactions and analyses.