she said it was good for you.

im trying to figuer out how that could possibly be good for you

oxidizes bacteria, etc?

seems logical. But it would also oxidize skin cells probaly if it oxidizes single-celled organisms

many many moons ago, a Chemists/pharmacy was more than just a drug store, it dealt with all things chemical that would be used, KNO3 is a meat preservative, and was used regularly for home use as this, also the old biscuit tins had a compartment inside that you`de put in saltpeter to keep the biscuits dry as a dessicant, in fact I actualy remember those old tins quite well

Stains of MnO2 on organic matter, from exposure to KMnO4-solutions, can be very efficiently removed with slightly acidic water solution of sodium sulfite.

Caution; the solution emits toxic and highly irritating vapor of sulfur dioxide, should be kept in a well ventilated area!

 

The stain of MnO2(s) is immediately reduced by the sulfite ion in acid solution to water soluble Mn2+. The stain is removed. Have tested it myself; even stains more than a month old are completely removed.

 

About chemical burns. The most painful burn experience I have is not from acids or alkalis, but from formaldehyde (40% H2O-soln). Extremely painful.

 

One of the most dangeorus chemicals in this respect is hydrofluoric acid.

Causes deep painful burns, even necrosis.

Ive heard that Br produces painful sores that heal very slow. Whats necrosis?

its when cells die

necrosis is the death of living tissue.

So if you get oxidized by H2O2 you have necrosis because its killing living cells? Or is necrosis when cells just start dying quickly from a trauma and keep spreading?

IIRC from Biology class, there are certan organelles in each cell like Lysosomes that use a hydrolytic enzyme thats responsible for destroying the cell when its life is over, one of these types releases H2O2 as part of it`s self destruct mechanism (I can`t remember what name the cell part had though).

yes, the enzyme is catalase. it catalyzes the decomposition of hydrogen peroxide, which is indeed formed in the cell sometimes as a product of respiration.