An irradiation cell for electron pulse radiolysis experiments in reactive liquid fluoride media, such as anhydrous hydrogen fluoride, is described. The construction material is Kel‐F, the irradiation window being a part of the body of the cell. The optical windows for the analytical light are made from sapphire. The cell has been tested with reactive solutions which have been added and removed on a vacuum line, and has been shown to be suitable for electron beam radiolysis studies.