It can be prepared by partial reduction of nitrobenzene. Benzidine is prepared in a two step process from nitrobenzene. Industrial electrosynthesis using nitrobenzene is also employed. This detoxification method produces low concentrations of nitrobenzene, aniline, and nitrosobenzene. Classically phenazine are prepared by the reaction of nitrobenzene and aniline in the Wohl-Aue reaction. Modern cells are more commonly filled with liquids such as nitrobenzene. Some polar liquids, such as nitrotoluene (CHNO) and nitrobenzene (CHNO) exhibit very large Kerr constants. For example, chloroform, nitrobenzene, and ethylene glycol are sweet, but also toxic. It reacts with nitrobenzene to produce phenazine in the Wohl-Aue reaction. For instance, nitryl benzene is normally called nitrobenzene (PhNO). One important use of oleum as a reagent is the secondary nitration of nitrobenzene. In their experiment, they introduced a cell containing nitrobenzene into a ruby laser cavity. Another disadvantage of Kerr cells is that the best available material, nitrobenzene, is poisonous. Typical additives include 1,8-octanedithiol, ortho-dichlorobenzene, 1,8-diiodooctane (DIO), and nitrobenzene. Nitrobenzene is an organic compound with the chemical formula CHNO.