4-(sec-Butyl)aniline is primarily used as an intermediate in the synthesis of various chemical compounds. It plays a significant role in the production of dyes and pigments, where it contributes to the development of colorants for textiles, plastics, and inks. Additionally, this chemical is utilized in the pharmaceutical industry for the creation of certain active pharmaceutical ingredients (APIs) and intermediates. Its structure allows it to act as a building block in organic synthesis, enabling the formation of more complex molecules. In agrochemicals, it is employed in the formulation of herbicides and pesticides, aiding in crop protection. Its versatility in chemical reactions makes it valuable in research and industrial applications.