Used in the treatment of cancers that overexpress EGFR, such as non-small cell lung cancer, colorectal cancer, and head and neck squamous cell carcinoma. It works by binding to the extracellular domain of EGFR, blocking signaling pathways that drive tumor growth and proliferation. Employed as a reference standard in immunoassays and biosimilar development to ensure consistency and accuracy in therapeutic antibody testing. Also utilized in pharmacokinetic and pharmacodynamic studies during drug development.