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9.1.5: Nonreducing Sugar

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  • A nonreducing sugar is a carbohydrate that is not oxidized by a weak oxidizing agent (an oxidizing agent that oxidizes aldehydes but not alcohols, such as the Tollen’s reagent) in basic aqueous solution. The characteristic property of nonreducing sugars is that, in basic aqueous medium, they do not generate any compounds containing an aldehyde group.

    eg: sucrose, which contains neither a hemiacetal group nor a hemiketal group and, therefore, is stable in water.

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