(S)-Methyl 2,3-diaminopropanoate dihydrochloride is primarily utilized in organic synthesis as a chiral building block for the preparation of complex molecules. Its stereochemistry makes it valuable in the development of pharmaceuticals, particularly in the synthesis of enantiomerically pure compounds. It serves as a precursor in the production of various biologically active molecules, including peptides and enzyme inhibitors, where the (S)-configuration is critical for activity. Additionally, it is employed in research settings for studying stereochemical reactions and developing new synthetic methodologies. Its application extends to the field of medicinal chemistry, where it aids in the design of drugs targeting specific biological pathways with high selectivity.