How To Prepare Tollen’s Reagent - BIOSCIENCE EDUCATION

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Friday, 21 November 2025

How To Prepare Tollen’s Reagent

Tollen’s Reagent


Purpose: Detects aldehydes (reducing agents).

Procedure:

  1. Prepare fresh before use:

    • Mix 2 ml of 0.1 M silver nitrate solution.

    • Add a few drops of dilute NaOH to form Ag₂O precipitate.

    • Add dilute ammonia dropwise until the precipitate just dissolves.

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