Alkylated diphenylamines are widely used as antioxidants in various industrial applications. They are particularly effective in stabilizing lubricants, fuels, and polymers against oxidative degradation. In lubricants, they help extend the service life by preventing the formation of sludge, varnish, and corrosive by-products. In fuels, they improve stability and reduce the formation of deposits in engines. Additionally, they are utilized in rubber and plastic industries to enhance the durability and performance of materials by protecting them from heat and oxygen-induced breakdown. Their ability to scavenge free radicals makes them valuable in maintaining the integrity and efficiency of products exposed to harsh conditions.