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Question

What is Seliwanoff's Test?


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Solution

Seliwanoff’s test

  • Seliwanoff's test is used to differentiate between aldose and ketose, i.e., it helps to detect the presence of aldo sugar and keto sugar.
  • Seliwanoff's reagent is a mixture of resorcinol and concentrated hydrochloric acid.

Seliwanoff’s test with aldose and ketose

  • Ketose sugars react with the Seliwanoff's reagent to give immediately a deep cherry red color.
  • Aldose sugars react with the Seliwanoff's reagent to give faint pink color which intensifies with time.

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