Used as a reference standard in environmental testing laboratories to quantify the presence of 2,4'-DDD in soil, water, and biological samples. It is essential in gas chromatography (GC) and liquid chromatography-mass spectrometry (LC-MS) analyses for monitoring pesticide residues, particularly breakdown products of DDT. Helps ensure accurate detection and regulatory compliance in agricultural and ecological studies. Also used in research to assess environmental persistence and bioaccumulation of organochlorine compounds.