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- Potassium Permanganate, U.S.P., has a limited topical efficacy against bacteria and fungi. Concentrations of 1:5000 or more are necessary for an effective bactericidal action, but they are irritating to tissues. Consequently, solutions of 1: 10,000 are usually used. However, up to an hour may be required to kill many bacteria, and some strains survive exposure to this concentration. For this reason, permanganate has been made obsolete by much superior antiseptic and antifungal drugs. (en)
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