Potassium Permanganate BP. Potassium permanganate is a mild antiseptic. It is used to clean & deodorise oozing, eczematous skin conditions & wounds. It is used in solution at a strength of 0.01% (one part in 10, 000). Tablets (400mg) for dissolving in water are available. One tablet dissolved in six pints of water (3.4 litres) will produce a 0.01% solution.