Abstract: The electroreduction of alizarin green has been studied by polarographyand cyclic voltammetry. One to four waves of alizarin green appear depending on pH in Britton-Robinson buffer solution. Wave Ⅰ and Wave Ⅰ V are of adsorption character.Thesum of wave Ⅰ and wave Ⅱ is related to the electroreduction of alizaringreen from its oxidized form to an intermediate, while wave Ⅲ is due to thefurther reduction. An electroreduction mechanism of alizarin green involvingdisproportion reaction has been proposed.