Dichloromethylenediphosphonic acid is primarily used as a corrosion inhibitor and scale preventer in industrial water treatment systems, including cooling towers, boilers, and heat exchangers. It controls metal ion deposition and stabilizes ions through chelating properties, reducing corrosion risk and extending equipment lifespan. It is also employed in detergent formulations to bind calcium and magnesium ions, enhancing cleaning efficiency. In the oil and gas industry, it inhibits scale formation in pipelines and drilling equipment. Additionally, it finds application in the paper and pulp industry to prevent mineral deposition during production processes. Its versatility makes it a valuable specialty chemical in various industrial applications.