Used as a selective heavy metal chelator in water treatment processes, particularly effective in removing mercury, lead, and cadmium from industrial wastewater. Its thiol-functionalized resin structure allows for high-affinity binding of soft metal ions, even in acidic or high-salinity environments. Commonly applied in mining, electroplating, and semiconductor manufacturing effluent treatment to meet regulatory discharge limits. Also utilized in purification systems for recovering valuable metals from process streams. Stable across a wide pH range and exhibits minimal interference from common cations like calcium or magnesium.