Used primarily as a reference standard in environmental testing laboratories to quantify the presence of 2,4'-DDD in soil, water, and biological samples. It ensures accurate calibration of analytical instruments like gas chromatographs (GC) and high-performance liquid chromatography (HPLC) systems. Commonly applied in monitoring pesticide degradation products, especially from DDT, to assess environmental contamination and compliance with regulatory standards. Also utilized in research studies focused on persistent organic pollutants and their impact on ecosystems and human health.