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Nail staining from potassium permanganate soaks
Keywords: KMnO4, Condy's crystals, Cutaneous stain, Foot, Fungal infection, Toenail
Potassium permanganate is an oxidising agent with disinfectant, deodorising, and astringent properties. Its chemical formula is KMnO4. It is sometimes called by its common name, Condy's crystals.
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Source: dermnetnz.org