4-n-Dodecylaniline is primarily used in the synthesis of organic compounds, particularly in the development of surfactants and emulsifiers due to its amphiphilic nature. Its long alkyl chain makes it effective in reducing surface tension, which is beneficial in formulations for detergents, cleaning agents, and industrial lubricants. Additionally, it serves as an intermediate in the production of dyes and pigments, where its aromatic amine group enables the creation of colorants with specific properties. In research, it is utilized in the study of self-assembled monolayers and surface modification techniques, contributing to advancements in nanotechnology and material science. Its role in organic synthesis also extends to the preparation of liquid crystals, which are essential in display technologies like LCDs.