Used primarily in the synthesis of conductive polymers, particularly PEDOT (poly(3,4-ethylenedioxythiophene)), which is widely applied in organic electronics, including flexible displays, solar cells, and sensors. It serves as a key monomer due to its ability to enhance electrical conductivity and stability in these materials. Additionally, it is utilized in the production of electrochromic devices, which change color in response to an electric current, and in anti-static coatings for various surfaces. Its derivatives are also explored in organic light-emitting diodes (OLEDs) and as components in advanced battery technologies.