The discovery of a stable organic radical formed under mild, clean, and efficient light-mediated conditions is reported. The structure of the stable acridinium-based radical photoproduct was unambiguously established by several techniques. This unique aromatic radical is featured by amphoteric redox behavior and π-dimerization properties in water and in the less studied perfluorohexane, two solvents of opposite polarity enabling to propose a solvophobic behavior in perfluorocarbon.