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Methylene blue

Methylene Blue, methylthionine chloride or 3,7-bis(dimethylamino)phenothiazin-5-ium chloride is a chemical compound used as a dye and medication for Gram's stain, Wright stain[?], and the treatment of metoxyhemoglobinemia.

Its molecular formula is C₁₆H₁₈Cl N₃S.

Its CAS number is 61-73-4: its EC number is 200-515-2 .

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