Used in research and development of targeted cancer therapies, particularly for tumors overexpressing IGF-1R, such as certain breast, lung, and sarcomas. Functions by blocking insulin-like growth factor 1 receptor signaling, inhibiting tumor cell proliferation and survival. Employed as a reference standard in antibody-drug conjugate development, biosimilar characterization, and immunoassay validation. Also utilized in flow cytometry, immunohistochemistry, and in vivo studies to assess target engagement and mechanism of action. Supports evaluation of pharmacokinetics and pharmacodynamics in preclinical models.