Ethanaminetetrafluoroborate, also known as ethylammonium tetrafluoroborate, is a specialty chemical used primarily as a component in ionic liquids and electrolytes. It features a protic cation and the stable tetrafluoroborate anion, providing high ionic conductivity, thermal stability, and low volatility. Applications include electrochemical devices such as batteries, supercapacitors, and fuel cells, as well as solvents or catalysts in green organic synthesis. It is valuable in pharmaceutical and materials science for enabling efficient, environmentally friendly processes.