2-Methylnaphthalene is a key intermediate used primarily in the production of 2-naphthoic acid via oxidation. It is employed in the manufacture of dyes and pigments, especially in synthesizing certain azo dyes through conversion to 2-naphthol. It serves as a precursor in the production of vitamin K derivatives, particularly vitamin K3 (menadione), via oxidation and chemical modification. Additionally, it is utilized in the synthesis of specialty chemicals such as surfactants (surface-active agents) and corrosion inhibitors. Due to its aromatic structure, it finds application in the development of photoconductors and organic semiconductors. It is also used in research as a model compound for studying polycyclic aromatic hydrocarbon (PAH) behavior in environmental systems.