SI-2 hydrochloride is primarily utilized in biochemical research, particularly in the study of protein-protein interactions and cellular signaling pathways. It is known for its role as an inhibitor of specific protein targets, making it valuable in understanding the mechanisms of diseases such as cancer. Researchers use it to explore the effects of disrupting certain signaling cascades, which can provide insights into potential therapeutic strategies. Additionally, it is employed in drug discovery efforts to evaluate the efficacy of novel compounds targeting similar pathways. Its application is largely confined to laboratory settings, where it aids in the development of targeted therapies and the advancement of molecular biology knowledge.