On May 14, 2009, Jonnalagadda, S. B.; Shezi, M. N. published an article.Quality Control of 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride The title of the article was Kinetics and mechanism of the oxidation of methylene violet by bromate at acidic pH and the dual role of bromide ion. And the article contained the following:
A phenazinium-type dye during oxidation by bromate ion under acidic conditions exhibited a complex nonlinear behavior. The intricate kinetics of reaction of 3-amino-7-(dimethylamino)-5-phenylphenazium chloride (MV+) with acidic bromate was investigated using the stopped flow technique. Under excess acid and bromate concentration conditions, MV+ exhibited a very slow reaction initially but a very rapid reaction after an induction time. The reaction had first-order dependence on both H+ and BrO3- ions. The overall stoichiometric reaction is 2MV+ + 2BrO3- + H2O → 2MP + 2HONEt2 + N2O + 2H+ + 2Br-, where MP is dioxophenylphenazine. The active roles of various bromo and oxybromo species in the mechanism are discussed. The rapid kinetics of the direct reaction of bromine with MV+ is also reported. A 19-step mechanism, consistent with the exptl. data and validated by simulations using Simkine-2, is proposed. The experimental process involved the reaction of 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride(cas: 4569-86-2).Quality Control of 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride
The Article related to methylene violet dye acidic bromate oxidation kinetics mechanism, Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers: Structure Correlation With Physical Properties and other aspects.Quality Control of 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride
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Chloride – Wikipedia,
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