Dichlorophene is primarily used as a biocide in industrial and household products. It is effective against bacteria, fungi, and algae, making it a common additive in cooling water systems, paper mills, and metalworking fluids to prevent microbial growth. It is also found in some disinfectants and sanitizers due to its antimicrobial properties. In personal care products, it has been used as a preservative and antiseptic, particularly in soaps and lotions, though its use has declined due to environmental and health concerns. Additionally, dichlorophene has been employed in wood preservatives and paints to protect against mold and mildew.