Used as a reference standard in environmental testing laboratories to calibrate analytical instruments for the detection and quantification of 2,4-dichlorophenol in water, soil, and wastewater samples. Commonly applied in gas chromatography (GC) and high-performance liquid chromatography (HPLC) methods to ensure accurate measurement of chlorophenol contaminants. Helps monitor industrial discharges, assess pollution levels, and comply with regulatory guidelines for pesticide and disinfectant byproduct analysis. Also used in research settings to study degradation pathways of chlorinated organic compounds.