Used in the preparation of radiolabeled compounds for medical imaging, particularly in positron emission tomography (PET). The azido group enables click chemistry conjugation with alkynes, allowing efficient attachment to biomolecules such as peptides or antibodies. The DOTA moiety chelates metal ions like gallium-68 or copper-64, making it suitable for targeted imaging of tumors and other disease sites. Its amide group enhances solubility and stability in biological environments, supporting in vivo applications with improved pharmacokinetics.