Used primarily in environmental and analytical chemistry as a reference standard for the detection and quantification of polychlorinated biphenyls (PCBs) in various samples. It helps in monitoring pollution levels in soil, water, and air, ensuring compliance with environmental regulations. Additionally, it aids in research studies focused on understanding the persistence, distribution, and impact of PCBs in ecosystems. Its application is crucial in developing and validating analytical methods for accurate PCB measurement in complex matrices.