Used as a selective inhibitor of protein tyrosine kinases, particularly targeting the EGFR (epidermal growth factor receptor) pathway. Commonly applied in research to study signal transduction mechanisms involved in cell proliferation, differentiation, and oncogenesis. Employed in cancer research to evaluate the role of tyrosine phosphorylation in tumor development and to assess potential therapeutic strategies targeting kinase activity. Also utilized in studies of inflammation and immune responses due to its modulatory effects on cytokine signaling. Its cell-permeable nature makes it suitable for in vitro assays in cell culture models.