β-Asp-Phe methyl ester is primarily used in the food and beverage industry as a key intermediate in the production of aspartame, a widely used artificial sweetener. Its role is crucial in the synthesis process, where it undergoes further chemical reactions to form the final product. Additionally, it finds application in research and development for studying peptide synthesis and modification, aiding in the creation of novel compounds with potential pharmaceutical or nutritional benefits. Its stability and reactivity make it a valuable component in both industrial and laboratory settings.