Used in research and development for studying interleukin-5 (IL-5) signaling pathways, particularly in eosinophil-mediated inflammatory diseases. Serves as a reference standard in immunoassays and bioassays to evaluate the performance of anti-IL-5 therapeutics. Employed in comparative studies to assess binding affinity, neutralization activity, and biosimilarity of new antibody candidates. Supports quality control in biopharmaceutical manufacturing by providing a benchmark for consistency and potency testing.