(S)-(-)-Cotinine丨CAS 486-56-6

(S)-(-)-Cotinine is primarily used in analytical, biochemical, and pharmacological research. As the major metabolite of nicotine, it serves as a reliable biomarker for assessing nicotine exposure in clinical studies, toxicology investigations, environmental monitoring, and population-level behavioral research. It is widely applied in method development for LC-MS/MS, GC, and immunoassay analysis, supporting the calibration and validation of analytical instruments. In neuroscience and pharmacodynamic studies, (S)-(-)-cotinine is used to explore nicotinic receptor interactions, metabolic pathways, and the physiological fate of nicotine. Additionally, it is employed in the development of diagnostic assays that monitor smoking cessation, secondhand smoke exposure, and metabolic differences among individuals. Its defined stereochemistry makes it valuable for studies requiring enantiomer-specific activity and metabolism.

The chief benefit of (S)-(-)-cotinine is its long half-life and metabolic stability compared to nicotine, making it a dependable and quantifiable indicator of nicotine intake in research settings. Its chemical robustness allows it to maintain integrity during sample collection, storage, and analytical processing, ensuring accurate results across diverse matrices such as blood, urine, saliva, and hair. The enantiomerically pure form enables precise modeling of stereospecific metabolic pathways, enhancing the reliability of pharmacokinetic and toxicological studies. Because cotinine levels correlate strongly with recent nicotine exposure, the compound is beneficial for developing sensitive diagnostic assays and refining methodologies for public-health monitoring. Its consistent behavior across analytical platforms also supports high reproducibility in laboratory workflows.