Ac-Phe-NH2 is commonly used in peptide synthesis as a building block for creating more complex peptide structures. It serves as a key intermediate in the development of bioactive peptides and pharmaceutical compounds. In research, it is utilized to study peptide interactions, enzyme mechanisms, and receptor binding due to its specific phenylalanine moiety. Additionally, it is employed in the preparation of peptide-based drugs targeting neurological disorders, as phenylalanine derivatives can influence neurotransmitter activity. Its stability and well-defined structure make it a valuable tool in both academic and industrial settings for designing and testing novel therapeutic agents.