IPA-3 is primarily used in biochemical research as a selective inhibitor of p21-activated kinase 1 (PAK1). It is particularly valuable in studies focused on understanding the role of PAK1 in cellular processes such as cytoskeletal reorganization, cell motility, and signal transduction pathways. Researchers utilize IPA-3 to investigate the implications of PAK1 inhibition in cancer biology, as PAK1 is often implicated in tumor growth and metastasis. Additionally, it serves as a tool to explore the involvement of PAK1 in neurological disorders and immune responses, providing insights into potential therapeutic targets. Its specificity makes it a critical compound for dissecting PAK1-related mechanisms in various disease models.