732 Resin is used as a cation exchange resin, popular in water softening processes. It removes mineral ions causing hardness, such as calcium (Ca²⁺) and magnesium (Mg²⁺), from water through exchange with hydrogen (H⁺) or sodium (Na⁺) ions, depending on the resin's conditioning.

Additionally, this resin is used in deionized water production systems for the electronics, machinery, pharmaceutical, and laboratory industries, as it effectively removes various ions, helping to prevent corrosion and scale buildup in pipes and equipment.

732 Resin can be regenerated after use by backwashing with an acid solution, such as hydrochloric acid, providing a long service life and cost-effectiveness for industrial applications.