I once did a postmortem exam on a giant breed dog. The dog had died of a ruptured spleen, and the abdomen contained most of the dog’s blood volume.
The kid whose job it was to clean up the mess I had made, thought that pouring H2O2 into the pool of blood in the tub would simplify cleanup. He was massively incorrect. Imagine turning on a hot tub filled with blood/bubble bath mix. :eek:
hydrogen peroxide is an oxidant. It can react react with many of your bodies vital chemicals, destroying them, and killing the cell.
Hydrogen peroxide will break down to give oxygen with many chemicals apart from enxymes. Metals compounds are good catalysts - the black stuff inside batteries (manganese dioxide) is very efficient.
Concentrated hydrogen peroxide will sting unbroken skin as it behaves a bit like water - it can penetrate the skin until it gets down to the living tissue, causing damage.
Concentrated compared to household concentrations. Household peroxide solutions are usually 2-3%. 20-30% hydrogen peroxide is concentrated enough to be a burn hazard to exposed skin, but not the hazard for explosion that higher concentrations can be.
In my recent first aid training class, we were told not to use peroxide to clean wounds as it will kill off your good white cells that are trying to protect your body as well as any germs. Just clean gently with mild soap and water. You can use Neosporin ™ or something like that and cover it, if it looks infected call a Dr.