D-2-Aminoadipic acid is primarily used in biochemical research as a precursor in the study of metabolic pathways, particularly those involving lysine biosynthesis and degradation. It serves as an intermediate in the production of various bioactive compounds and is utilized in the synthesis of peptides and other organic molecules. Additionally, this compound is employed in the development of pharmaceuticals, where it acts as a building block for drugs targeting neurological disorders and metabolic diseases. Its role in understanding and manipulating biochemical processes makes it valuable in both academic and industrial settings.