Used as a reference standard in environmental testing laboratories to calibrate instruments and validate analytical methods for detecting chlorophenols in water, soil, and wastewater samples. Commonly employed in gas chromatography (GC) and high-performance liquid chromatography (HPLC) to quantify trace levels of 2,4-dichlorophenol, a breakdown product of pesticides and wood preservatives. Ensures accuracy and consistency in monitoring regulatory compliance and assessing contamination in industrial and agricultural settings. Also used in research studies focused on pollutant degradation and toxicity evaluation.