Naphthalene in methanol is commonly used as a solvent mixture in various industrial and laboratory applications. It is particularly effective in dissolving organic compounds, making it useful in chemical synthesis and research. This mixture is also employed in the preparation of dyes, resins, and other chemical intermediates. In analytical chemistry, it serves as a medium for chromatography and spectrophotometry to analyze and separate complex mixtures. Additionally, it finds use in the production of moth repellents and as a cleaning agent for removing tough residues. Its ability to dissolve naphthalene efficiently makes it a valuable component in formulations requiring controlled solubility and evaporation rates.