The pseudo-first-order rates of the alkaline fading of crystal violet have been studied in detail in aqueous and ethylene glycol media as well as in water/Aerosol OT (AOT)/decane, water/AOT/isooctane, and ethylene glycol/AOT/isooctane microemulsion media. Both ethylene glycol and its microemulsion have shown reaction-accelerating effects compared with other environments. The rate of reaction in the microemulsion medium is inversely proportional to the water/AOT or the ethylene glycol/AOT mole ratio; significant increases in rates occur at ratios less than 8 in the former and less than 4 in the latter. The energetics of the reaction have offered distinct features in different environments; the Delta H double dagger and Delta S double dagger values have shown isokinetic effects. Normal salt effects have been observed in water-containing media; ethylene glycol alone and in a microemulsion has shown equivalent but abnormal effects.