2-Chlorophenanthrene is primarily used in research and development within the field of organic chemistry. It serves as a key intermediate in the synthesis of more complex polycyclic aromatic hydrocarbons (PAHs), which are studied for their unique chemical properties and potential applications in materials science. Additionally, it is utilized in environmental studies to understand the behavior and degradation of chlorinated PAHs, which are pollutants of concern due to their persistence and potential toxicity. In pharmaceutical research, derivatives of 2-Chlorophenanthrene are explored for their biological activity, particularly in the development of new therapeutic agents.