Used in biochemical research as an intermediate in the kynurenine pathway, which plays a key role in tryptophan metabolism. It helps in studying neurodegenerative diseases such as Alzheimer's, Huntington's, and schizophrenia due to its involvement in the production of neuroactive metabolites and potential neurotoxicity. Also utilized in assays to measure enzyme activity, particularly kynureninase and kynurenine aminotransferase. Its presence in biological samples serves as a biomarker for immune activation and inflammation. Investigated for potential roles in eye lens physiology and cataract formation due to accumulation in ocular tissues. Applied in drug development targeting this pathway to control levels of intermediates that may cause cellular damage.