1,1'-Dinaphthylamine is primarily used in the synthesis of dyes and pigments, particularly in the production of high-performance colorants for textiles and plastics. Its structure allows it to act as an intermediate in creating complex organic compounds with strong color properties. Additionally, it finds application in the development of optical brighteners, which enhance the appearance of materials by absorbing ultraviolet light and emitting blue light. In research, it serves as a building block for organic semiconductors and conductive polymers, contributing to advancements in electronic devices. Its role in corrosion inhibitors is also notable, where it helps protect metal surfaces in industrial settings.