IQ-3 is primarily utilized in biochemical research as a selective inhibitor of p21-activated kinase 1 (PAK1). Its application is significant in studying cellular signaling pathways, particularly those involved in cancer progression, as PAK1 plays a crucial role in regulating cell motility, survival, and proliferation. Researchers use IQ-3 to investigate the mechanisms of tumor growth and metastasis, providing insights into potential therapeutic targets. Additionally, it is employed in studies exploring the role of PAK1 in neurological disorders and immune responses, aiding in the development of targeted treatments for these conditions.