3-Chloro-5-iodoaniline is primarily used as an intermediate in the synthesis of more complex chemical compounds. It plays a significant role in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. The compound is often utilized in the development of active pharmaceutical ingredients (APIs) due to its halogenated structure, which can enhance the biological activity of the final product. Additionally, it is employed in the creation of dyes and pigments, where its unique structure contributes to the desired color properties. Its application in research and development also extends to the field of material science, where it is used to develop advanced materials with specific electronic or optical characteristics.