Piperidine-4-carbonitrile hydrochloride is widely used as a key intermediate in the synthesis of various pharmaceutical compounds. It plays a significant role in the development of drugs targeting central nervous system disorders, including antipsychotics and antidepressants. Additionally, it is utilized in the preparation of bioactive molecules with potential applications in treating pain and inflammation. Its versatility also extends to the field of organic chemistry, where it serves as a building block for constructing complex heterocyclic structures, which are essential in drug discovery and development.