Coupling reaction - miscellaneous reactions, Chemistry

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Coupling reaction - Miscellaneous reactions

Phenol couples along with benzene diazonium chloride in existence of an alkaline solution to make a red dye (p-hydroxy azobenzene).

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Phenol couples with phthalic anhydride in existence of concentrated   to make a dye, (phenolphthalein) used as an indicator.


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