CPPHA is primarily used in scientific research, particularly in the field of neuroscience and pharmacology. It acts as a potent and selective positive allosteric modulator of the metabotropic glutamate receptor subtype 5 (mGluR5). This receptor plays a crucial role in synaptic transmission and plasticity, making CPPHA a valuable tool for studying neurological disorders such as Parkinson's disease, schizophrenia, and anxiety. Researchers utilize CPPHA to enhance receptor activity, allowing for a better understanding of mGluR5's function and its potential as a therapeutic target. Its application extends to drug discovery, where it helps in the development of novel treatments targeting glutamate-related pathways.