IRAK inhibitor 6 is primarily used in research settings to study the role of IRAK (Interleukin-1 Receptor-Associated Kinase) in immune signaling pathways. It is particularly valuable in investigating inflammatory and autoimmune diseases, as IRAK plays a critical role in the activation of NF-κB and MAPK pathways, which are central to immune responses. Researchers use this inhibitor to explore potential therapeutic strategies for conditions like rheumatoid arthritis, lupus, and other inflammatory disorders. Additionally, it helps in understanding the mechanisms of innate immunity and Toll-like receptor signaling, providing insights into how these pathways can be modulated to treat various diseases.