IKK(epsilon)-IN-1 is primarily used in research settings to study the role of IKKε (IκB kinase epsilon) in various cellular processes. It is a selective inhibitor of IKKε, which is involved in the regulation of inflammatory responses and immune signaling pathways. Researchers utilize this compound to investigate its effects on diseases where IKKε plays a critical role, such as cancer, viral infections, and autoimmune disorders. By inhibiting IKKε, it helps in understanding the molecular mechanisms underlying these conditions and aids in the development of potential therapeutic strategies. Additionally, it is employed in biochemical assays to explore the interaction between IKKε and other signaling molecules, providing insights into pathway regulation and potential drug targets.