Used primarily as a reagent in analytical chemistry for the detection and quantification of metal ions, particularly in complexometric titrations. It serves as an indicator due to its distinct color change in the presence of specific metal ions, aiding in the precise determination of endpoint in titrations. Additionally, it finds application in research laboratories for studying metal-ligand interactions and in the development of analytical methods for environmental and industrial samples. Its utility is also seen in educational settings for teaching principles of titration and chemical analysis.