Used as a reference standard in environmental testing laboratories to calibrate analytical instruments for the detection and quantification of simazine in water, soil, and agricultural samples. Commonly employed in high-performance liquid chromatography (HPLC) and gas chromatography (GC) methods to ensure accurate measurement of simazine residues. Helps maintain compliance with regulatory limits for herbicide levels in drinking water and food products. Also used in research studies assessing the persistence and degradation of triazine herbicides in the environment.