Used as a chelating agent in analytical chemistry for the detection and determination of metal ions such as copper, nickel, and cobalt due to its ability to form stable complexes. It serves as a precursor in the synthesis of fluorescent sensors and dyes, where its structure allows for coordination with metal centers to enhance optical properties. Also applied in the development of coordination polymers and metal-organic frameworks (MOFs) for catalytic and sensing applications. Its bifunctional acidic and amine groups make it suitable for modifying surfaces in biosensors and in immobilization of biomolecules.