N-Phenyl-2-naphthylamine is widely used as an antioxidant in the rubber industry. It helps to prevent the degradation of rubber products caused by exposure to oxygen, heat, and light, thereby extending their lifespan. This chemical is particularly effective in stabilizing synthetic rubbers and is often incorporated into tires, belts, hoses, and other rubber components to enhance their durability and performance. Additionally, it is utilized in the production of lubricants and greases, where it acts as an additive to inhibit oxidation and maintain the quality of the lubricating materials under high-temperature conditions. Its antioxidant properties also make it valuable in the preservation of certain plastics and elastomers, ensuring they retain their structural integrity over time.