4-tert-Butylaniline 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, particularly for coloring textiles, plastics, and other materials. Its chemical structure allows it to act as a building block for creating complex dye molecules with specific color properties. Additionally, it is utilized in the manufacture of agrochemicals, such as herbicides and pesticides, where it contributes to the development of active ingredients. In the pharmaceutical industry, it serves as a precursor in the synthesis of certain drugs, aiding in the creation of compounds with therapeutic effects. Its applications also extend to the field of organic synthesis, where it is used to produce specialty chemicals for research and industrial purposes.