Tetracyanoethylene is widely used as a strong electron acceptor in organic chemistry, particularly in the synthesis of charge-transfer complexes and organic semiconductors. Its ability to form stable radical anions makes it valuable in the study of electron transfer reactions and the development of conductive materials. In polymer chemistry, it is employed as a cross-linking agent to enhance the thermal and mechanical properties of polymers. Additionally, it serves as a reagent in the preparation of dyes, pigments, and other organic compounds due to its reactivity with various functional groups. In analytical chemistry, it is utilized as a derivatization agent for detecting and quantifying specific compounds. Its unique electronic properties also make it useful in the field of molecular electronics and optoelectronics.