Question: Congo red is used as a direct dye for cotton. Write equations to show how it can be synthesized from benzidine and 1-aminonaphthalene-4-sulfonic acid. NH

Congo red is used as a direct dye for cotton. Write equations to show how it can be synthesized from benzidine and 1-aminonaphthalene-4-sulfonic acid.

NH NH N=N N-N so,H so,H Congo red NH H,N NH, O,H benzidine I-aminonaphthalene-4-sulfonic acid

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