Used primarily in research settings to study the behavior and effects of polychlorinated biphenyls (PCBs) in environmental and biological systems. It serves as a reference standard in analytical chemistry for detecting and quantifying PCB contamination in soil, water, and air samples. Due to its persistent nature, it helps scientists evaluate the long-term impact of chlorinated organic compounds on ecosystems and food chains. Also used in toxicology studies to assess bioaccumulation, metabolic pathways, and potential health risks associated with exposure to highly chlorinated biphenyls. Not used in commercial products or industrial applications due to its toxicity and environmental persistence.