When it is described as a self-indicator, it means that potassium permanganate can be used as an indicator in a chemical reaction to determine the endpoint or completion of the reaction. In acidic or alkaline solutions, potassium permanganate typically appears as a purple-colored solution. As the reaction progresses and the concentration of the reactants changes, the color of the potassium permanganate solution can often change, indicating the endpoint of the reaction. This property makes potassium permanganate a useful substance for titrations and other analytical chemistry applications.
