Used as a coagulant in water and wastewater treatment to remove suspended solids, phosphates, and other contaminants. It helps clarify water by forming flocs that trap impurities, making them easier to filter out. Commonly applied in municipal sewage treatment and industrial effluent systems. Also used in soil stabilization and dust control on construction sites. In the paper industry, it assists in pitch control and resin management. Additionally, employed in the production of other iron-based chemicals and in etching processes within the electronics industry.