Cyclopenta[d,e,f]phenanthrene is primarily studied for its role in environmental and toxicological research due to its presence as a polycyclic aromatic hydrocarbon (PAH) in various pollutants. It is often investigated for its potential carcinogenic effects, as it can form DNA adducts, leading to mutations and cancer development. This compound is also used in scientific studies to understand the mechanisms of PAH-induced toxicity and to develop strategies for mitigating its harmful effects. Additionally, it serves as a reference compound in analytical chemistry for detecting and quantifying PAHs in environmental samples like air, water, and soil.