Used as a chelating agent in the formation of stable complexes with metal ions, particularly in medical imaging applications. Its structure allows for strong coordination with gadolinium and other lanthanides, making it valuable in developing contrast agents for MRI. The mono-acid functional group enables further chemical modification, facilitating conjugation to targeting molecules such as peptides or antibodies for use in molecular imaging. Also employed in radiopharmaceuticals when complexed with radioactive metal isotopes, aiding in diagnostics and targeted therapy. Its high selectivity and stability reduce the risk of metal ion release in biological systems, enhancing safety in clinical applications.