Amberlite IRA-4200 is widely used in water treatment processes, particularly for deionization and demineralization. It effectively removes dissolved ions and impurities, making it essential in producing high-purity water for industrial and laboratory applications. In the pharmaceutical industry, it is employed for purifying active pharmaceutical ingredients (APIs) and ensuring compliance with stringent quality standards. Additionally, it plays a crucial role in the food and beverage sector for decolorization and removing unwanted contaminants. Its robust ion-exchange capacity also makes it valuable in chemical synthesis, where it aids in catalyst recovery and separation processes.