Naphthalene solution is widely used in the production of phthalic anhydride, a key ingredient in the manufacture of plastics, dyes, and resins. It serves as a moth repellent in the form of mothballs, protecting fabrics and clothing from insect damage. In the agricultural sector, it is utilized as a soil fumigant to control pests and nematodes. Additionally, it is employed in the synthesis of various chemicals, including surfactants and tanning agents. Its solvent properties make it useful in industrial cleaning applications and as a carrier for other chemical compounds.