Tollens' reagent

Tollens' test for aldehyde: left side positive (silver mirror), right side negative

Ball-and-stick model of the diamminesilver(I) complex

Tollens' reagent is a chemical reagent used to determine the presence of an aldehyde or alpha-hydroxy ketone functional groups. The reagent consists of a solution of silver nitrate and ammonia. It was named after its discoverer, the German chemist Bernhard Tollens. A positive test with Tollens' reagent is indicated by the precipitation of elemental silver, often producing a characteristic "silver mirror" on the inner surface of the reaction vessel.

单词	Tollens test
释义	Tollens test 英语百科 Tollens' reagent Tollens' reagent is a chemical reagent used to determine the presence of an aldehyde or alpha-hydroxy ketone functional groups. The reagent consists of a solution of silver nitrate and ammonia. It was named after its discoverer, the German chemist Bernhard Tollens. A positive test with Tollens' reagent is indicated by the precipitation of elemental silver, often producing a characteristic "silver mirror" on the inner surface of the reaction vessel.
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Tollens test

Tollens' reagent