Kelex-100 is widely used as a selective extractant in hydrometallurgical processes, particularly for the recovery of copper from aqueous solutions. Its ability to form stable complexes with copper ions makes it valuable in solvent extraction techniques, where it aids in separating and purifying copper from ores or waste materials. In the mining industry, Kelex-100 is employed to enhance the efficiency of metal extraction, reducing the need for energy-intensive methods. Additionally, it is utilized in the recycling of electronic waste, where it helps recover valuable metals such as copper from discarded devices. Its selectivity and effectiveness in acidic environments make it a preferred choice in various industrial applications focused on metal recovery and purification.