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(a) the possible reaction pathways of indigo carmine oxidation in a Briggs–Rauscher oscillatory reaction (b) the mechanism of indigo carmine (and its derivative) action with HOO• /HO• radicals. in the Briggs–Rauscher (BR) reaction (for more details see references [65,66,67,68]). The multiple oxidation reactions account for the high sensitivity of the BR towards indigo carmine.
