Carbylamine reaction

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The carbylamine reaction is a chemical test for detection of primary amines.[1] In this reaction, the analyte is heated with alcoholic potassium hydroxide and chloroform. If a primary amine is present, the isocyanide (carbylamine) is formed which are foul smelling substances.

For example, the reaction with ethylamine:

The carbylamine reaction with ethyl amine

The reaction with aniline:

The carbylamine reaction with aniline

The carbylamine test does not give a positive reaction with secondary and tertiary amines.

References