TikTokers, bloggers and forum contributors are sharing a chem lab-worthy trick for brightening whites, from shirts to shoes: start with a soak in a potassium permanganate diluted in water, then follow ...
Manganese heptoxide is an extremely powerful and dangerous oxidizer made from sulfuric acid (H2SO4) and potassium permanganate (KMnO4). It violently reacts with almost all organic material.