Used as a reference standard in analytical laboratories for the detection and quantification of coumachlor, a rodenticide, in environmental and biological samples. Commonly employed in chromatographic techniques such as HPLC and GC-MS to calibrate instruments and validate methods for pesticide residue analysis. Its presence in acetonitrile ensures good solubility and stability, making it suitable for precise and reproducible testing in food safety, forensic toxicology, and environmental monitoring.