1H-Cyclopenta[l]phenanthrene is primarily used in research settings, particularly in studies related to environmental chemistry and toxicology. It is often investigated for its presence and effects as a polycyclic aromatic hydrocarbon (PAH) in various environmental samples, such as air, water, and soil. Researchers focus on understanding its potential role as a pollutant and its impact on ecosystems and human health. Additionally, it serves as a model compound in the study of PAH metabolism and carcinogenicity, helping to elucidate the mechanisms by which similar compounds may contribute to cancer development. Its applications are largely confined to scientific and analytical contexts, where it aids in advancing knowledge about PAH behavior and toxicity.