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Methylene blue is an organic dye with many applications, from cell and bacteria staining in microscopy, disinfectant and for treating a blodd disease known as methemoglobinemia.
It is useful for chemical analysis because of its properties of redox indicator. At oxidant environment it has a blue color, while at reducing ones it is colorless (leucomethylene blue).
I will prepare a 2% solution of methylene blue in water.
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