Tetraethylenepentaminepentahydrochloride is primarily used in research and industrial applications as a crosslinking agent or chelating agent. It is effective in binding metal ions, making it useful in water treatment processes to remove heavy metals from wastewater. In the field of polymer chemistry, it serves as a curing agent for epoxy resins, enhancing their mechanical properties and thermal stability. Additionally, it is employed in the synthesis of specialty chemicals and as a reagent in organic reactions, particularly in the preparation of complex molecules. Its ability to form stable complexes with metals also finds applications in catalysis and corrosion inhibition.