L-Alanine benzyl ester p-toluenesulfonate salt is primarily used in organic synthesis and peptide chemistry. It serves as a protected form of L-alanine, where the benzyl ester group safeguards the carboxyl functionality during chemical reactions. This compound is particularly valuable in the synthesis of peptides, enabling the controlled assembly of amino acids without unwanted side reactions. It is also utilized in the preparation of chiral intermediates for pharmaceuticals, where the stereochemistry of L-alanine is crucial for the biological activity of the final product. Additionally, it finds application in research laboratories for studying enzyme mechanisms and developing novel bioactive compounds.