Baeyer test

A test for unsaturated compounds in which potassium per­manganate is used. Alkenes, for ex­ample, are oxidised to glycols, and the permanganate loses its colour:

3R₂C=CR₂ + 2KMnO₄ + 4H2O → 2MnO₂ + 2KOH + 3R₂COHR₂COH

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