DL-2-Aminoadipic acid is primarily used in biochemical research as a precursor in the study of metabolic pathways, particularly those involving lysine and tryptophan biosynthesis. It serves as an intermediate in the production of various pharmaceuticals and bioactive compounds. In industrial applications, it is utilized in the synthesis of specialty chemicals and polymers. Additionally, it plays a role in the development of nutritional supplements and is investigated for its potential in medical diagnostics related to metabolic disorders.