Phenanthrene-2-carboxylic acid finds use in organic synthesis, particularly as a building block for creating complex molecules. It serves as a precursor in the development of pharmaceuticals, especially in the synthesis of compounds with potential anti-inflammatory or anticancer properties. Additionally, it is utilized in research to study polycyclic aromatic hydrocarbons (PAHs) and their environmental impact. Its structure makes it valuable in the production of dyes and pigments, as well as in material science for creating organic electronic materials. The compound is also employed in analytical chemistry as a standard for identifying and quantifying PAHs in environmental samples.