How to obtain orange red dye from Benzene diazonium chloride?

Benzene diazonium chloride forms orange, red dye with Resorcinol, Cresol and Phenol.

  • Benzenediazonium chloride is a colourless solid and has so many uses in organic chemistry.
  • Benzene diazonium chloride is prepared by aniline. When aniline reacts with nitrous acid under low temperature (0-5 0 C), benzene diazonium chloride is given as the product.
  • The reaction of benzene diazonium chloride with resorcinol in a basic medium is a coupling reaction, in which p-hydroxyazobenzene is obtained that is nothing but orange dye.

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