Used primarily as a reference standard in environmental testing laboratories to quantify and monitor the presence of 2,4'-DDD in soil, water, and biological samples. It plays a critical role in assessing pesticide degradation products, especially those derived from DDT, helping researchers evaluate environmental contamination and persistence of organochlorine compounds. Commonly employed in gas chromatography (GC) and liquid chromatography-mass spectrometry (LC-MS) analyses to ensure accurate identification and measurement. Also utilized in regulatory compliance testing and ecological risk assessments.