Ionic liquids are salts that exist in a liquid state at relatively low temperatures, typically below 100°C. They are composed entirely of ions, which are charged particles, and have unique properties such as low volatility and high thermal stability. These characteristics make ionic liquids useful in various applications, including chemical synthesis, catalysis, and electrochemistry. Due to their ability to dissolve a wide range of materials, ionic liquids are also explored for use in green chemistry as environmentally friendly solvents. Their tunable properties allow researchers to design ionic liquids for specific tasks, enhancing their effectiveness in industrial processes and energy storage technologies.