Etidronic acid (HEDP) hydrate is widely used as a scale and corrosion inhibitor in water treatment systems, particularly in cooling towers, boilers, and reverse osmosis systems. It effectively prevents the formation of calcium carbonate, calcium sulfate, and other mineral scales, ensuring efficient operation of industrial equipment.

In the oil and gas industry, it is employed in well stimulation and acidizing processes to enhance oil recovery by dissolving mineral deposits in wells. It is also used in detergents and cleaning agents to soften water and improve cleaning efficiency by chelating metal ions.

Additionally, it finds application in the textile industry as a stabilizer in hydrogen peroxide bleaching processes, ensuring consistent and effective results. Its ability to sequester metal ions also makes it useful in preventing discoloration and degradation in various industrial and consumer products.