(R)-Trichostatic Acid is primarily used in biochemical research as a potent histone deacetylase (HDAC) inhibitor. It plays a significant role in studying epigenetic regulation, as it effectively modulates gene expression by altering chromatin structure. This compound is particularly valuable in cancer research, where it helps investigate the mechanisms of tumor suppression and cell differentiation. Additionally, it is utilized in neuroscience studies to explore its potential in treating neurodegenerative diseases by influencing neuronal gene expression. Its application extends to drug development, where it serves as a reference compound for designing new HDAC inhibitors with therapeutic potential.