Used as a reference standard in environmental testing laboratories to calibrate analytical instruments for the detection and quantification of simazine residues in water, soil, and agricultural samples. Commonly applied in high-performance liquid chromatography (HPLC) and gas chromatography (GC) methods to ensure accurate measurement of triazine herbicide contamination. Helps maintain compliance with regulatory limits set by environmental and food safety agencies. Also used in research studies assessing pesticide degradation, runoff, and persistence in ecosystems.