Oxanilide is primarily used as a UV stabilizer in various polymer and plastic formulations. It helps protect materials from degradation caused by ultraviolet light exposure, extending their lifespan and maintaining their physical properties. This makes it valuable in industries such as automotive, construction, and packaging, where plastics are exposed to sunlight. Additionally, it is employed in agricultural applications as a fungicide to control fungal diseases in crops, enhancing plant health and yield. Its stabilizing properties also find use in coatings and paints, where it prevents discoloration and degradation due to UV radiation.