What is the function of resorcinol in Seliwanoff’s test?

Sourav PanApril 21, 2025

Answered

Resorcinol acts as a reagent that reacts with the carbonyl group of the ketose sugars under acidic conditions. The resorcinol forms a red or pink-colored complex with the ketone group in fructose. This reaction is enhanced by the presence of concentrated hydrochloric acid, which catalyzes the reaction, facilitating the identification of ketoses, especially fructose.

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