S-(-)-Arundic Acid-d3 is primarily utilized in scientific research, particularly in studies focusing on neurological disorders. Its application is significant in the development of therapeutic agents aimed at mitigating the progression of diseases like amyotrophic lateral sclerosis (ALS) and stroke. The compound is often employed in pharmacokinetic and metabolic studies due to its deuterium labeling, which allows for precise tracking and analysis within biological systems. Researchers leverage its properties to better understand the mechanisms of neuroprotection and to evaluate the efficacy of potential treatments in preclinical models. Additionally, it serves as a valuable tool in the synthesis of labeled compounds for use in various biomedical research applications.