HA-100 is primarily utilized in biochemical and pharmacological research as a potent and selective inhibitor of protein kinases. It is particularly effective in studying cellular signaling pathways, as it inhibits cyclic AMP-dependent protein kinase (PKA) and protein kinase C (PKC). Researchers use HA-100 to investigate the roles of these kinases in various physiological processes, such as cell proliferation, differentiation, and apoptosis. Additionally, it serves as a valuable tool in understanding the mechanisms of kinase-related diseases, including cancer and inflammatory disorders. Its ability to modulate kinase activity makes it a critical compound in the development of targeted therapies and the exploration of intracellular signaling networks.