Used primarily in research and industrial applications, 2,4'-Dichlorobiphenyl serves as a reference standard in environmental testing to detect and quantify polychlorinated biphenyls (PCBs) in various samples. It is also employed in studies investigating the behavior, degradation, and toxicity of PCBs in ecosystems. Additionally, this compound is utilized in the development of analytical methods for monitoring PCB contamination in soil, water, and air. Its role in understanding the environmental impact and persistence of PCBs makes it valuable for regulatory and remediation efforts.