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Schiff's reagent

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A reagent used for testing for aldehydes and ketones, and in histochemistry to detect polysaccharides, DNA and proteins.

Description

A reagent used for testing for aldehydes and ketones, and in histochemistry to detect polysaccharides, DNA and proteins. It consists of a solution of fuchsine dye that has been decolourised by sulphur dioxide. Aliphatic aldehydes restore the pink immediately, whereas aromatic ketones have no effect on the reagent. Aromatic aldehydes and aliphatic ketones restore the colour slowly.

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