Hydrolyzed Polymaleic Anhydride (HPMA) is a water-soluble polymer created by the hydrolysis of polymaleic anhydride. It is used primarily as a chelating agent, scale inhibitor, and dispersant. HPMA is commonly applied in water treatment, detergents, and as an additive in industrial formulations. It helps control the formation of scale and improves the performance of other ingredients in various formulations.