Recent Examples of permanganate from the Web
That was the result of a disinfectant called potassium permanganate that leaked into the system, not algae, salt or aliens.
Fireworks usually include gunpowder, but a hobbyist has made this rather impressive bang using potassium permanganate in lieu of the more traditional ingredient.
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Learn More about permanganate
Britannica.com: Encyclopedia article about permanganate
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