MS023 hydrochloride is primarily utilized in biochemical research, particularly in the study of epigenetic regulation. It serves as a potent and selective inhibitor of protein arginine methyltransferase 4 (PRMT4), also known as coactivator-associated arginine methyltransferase 1 (CARM1). By inhibiting CARM1, this compound helps researchers investigate the role of arginine methylation in various cellular processes, including gene expression, signal transduction, and chromatin remodeling. Its application is crucial in understanding the mechanisms underlying diseases such as cancer, where CARM1 activity is often dysregulated. Additionally, MS023 hydrochloride is used in drug discovery efforts aimed at developing targeted therapies for conditions influenced by abnormal PRMT4 activity.