Used as a sensitive analytical reagent for the detection and spectrophotometric determination of metal ions, particularly transition metals such as iron, copper, and cobalt in environmental and biological samples. Its ability to form stable, colored complexes with these metals makes it valuable in quantitative analysis. Also employed in the development of colorimetric sensors due to its strong chromogenic properties. Shows potential in coordination chemistry as a ligand in the synthesis of metal-organic complexes with catalytic or magnetic properties.