DL-Phenylmercapturic Acid is primarily used as a biomarker in toxicological studies to assess exposure to benzene and other aromatic compounds. It is a metabolite formed in the body when benzene is processed, and its presence in urine is a reliable indicator of benzene exposure. This makes it valuable in occupational health monitoring, particularly for workers in industries like petrochemicals, manufacturing, and painting, where benzene exposure is a concern. Additionally, it aids in environmental health research to evaluate the impact of benzene pollution on populations. Its measurement helps in understanding the extent of exposure and in implementing safety measures to reduce health risks.