Used as a corrosion inhibitor in industrial water treatment systems, particularly in cooling water circuits where metal protection is critical. Its phosphonate groups strongly adsorb onto metal surfaces, forming a protective layer that prevents oxidation and scale buildup. Also applied in electrochemical processes as a surface modifier for electrodes due to its ability to stabilize charge transfer. Shows potential in CO2 capture systems by enhancing the performance of supported ionic liquid membranes. Effective in low concentrations, making it suitable for environmentally sensitive applications where minimal chemical usage is desired.