Primarily used in the production of dyes and pigments, 3,4-Dichloroaniline serves as a key intermediate in synthesizing various colorants for textiles, plastics, and inks. It is also utilized in the manufacturing of herbicides and pesticides, contributing to effective crop protection by controlling weeds and pests in agriculture. Additionally, this compound plays a role in the synthesis of pharmaceuticals, where it acts as a building block for certain active ingredients. Its applications extend to research and development, where it is used in chemical studies and as a reagent in organic synthesis.