A colour reaction of certain phenolic ethers and their derivatives with nitric acid

  • K. Visweswara Rao
  • T. R. Seshadri


A characteristic blue or green colour reaction with concentrated nitric acid is given by the fully alkylated ethers of resorcinol and phloroglucinol and by a number of carbonyl derivatives of them. n the case of these carbonyl compounds one orthohydroxyl could be free. Certain flavanone derivatives of phloroglucinol also give this test whereas chalkones, flavones, diketons and coumaranones do not. It is useful for the differentiation and characterisation of closely related and isomeric compounds belonging to the above categories.


Flavanone Methyl Ether Phloroglucinol Chalkones Sakuranetin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Narasimhachari and SeshadriProc. Ind. Acad. Sci.,A, 1948,27, 223.Google Scholar
  2. 2.
    Asahina,et al. J. Pharm. Soc. Japan, 1927,550, 1007.Google Scholar

Copyright information

© Indian Academy of Sciences 1949

Authors and Affiliations

  • K. Visweswara Rao
    • 1
  • T. R. Seshadri
    • 1
  1. 1.Department of ChemistryAndhra UniversityWaltair

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