PCMPA hydrochloride is widely used in biochemical research, particularly in the study of enzyme inhibition and signal transduction pathways. It serves as a potent inhibitor of specific phosphatases, making it valuable for investigating cellular processes like cell growth, differentiation, and apoptosis. Additionally, it is utilized in pharmacological studies to explore potential therapeutic applications in diseases involving abnormal phosphatase activity, such as cancer and neurodegenerative disorders. Its role in modulating enzyme activity also aids in understanding metabolic pathways and designing targeted drug therapies.