5-Ethynyl-2-fluoroaniline is primarily utilized in the field of organic synthesis, particularly in the development of pharmaceuticals and advanced materials. Its unique structure, featuring both an ethynyl group and a fluorine atom, makes it a valuable building block for creating complex molecules. In drug discovery, it is often employed as an intermediate in the synthesis of biologically active compounds, including potential therapeutic agents targeting various diseases. Additionally, its incorporation into polymers and materials can enhance properties such as thermal stability, electronic conductivity, or optical characteristics, making it useful in the production of specialized coatings, sensors, or electronic components. Its versatility and reactivity also make it a key component in click chemistry reactions, enabling efficient and selective bond formations in diverse applications.