(R)-2-Naphthylalanine Hydrochloride Salt is primarily used in the field of peptide synthesis and pharmaceutical research. It serves as a chiral building block for creating peptides with specific stereochemistry, which is crucial for developing drugs with targeted biological activity. The compound is often employed in the synthesis of enzyme inhibitors and receptor ligands, where its unique structure helps enhance binding affinity and selectivity. Additionally, it is utilized in studies related to asymmetric synthesis and catalysis, contributing to the development of more efficient and sustainable chemical processes. Its application extends to biochemical research, where it aids in understanding protein interactions and designing bioactive molecules.