Been using [tex]H_2 O_2[/tex] to sterilize a wound. I notice that it fizzes. 1] I presume the bubbles it releases are [tex]O_2[/tex]. i.e. [tex]2 H_2 O_2 > 2H_2 O + O_2[/tex] 2] I further presume it is the [tex]O_2[/tex] that kills the bacteria. And that makes me wonder: 3] I notice that it only fizzes on my wound - it does not fizz when applied to normal skin (or the container it comes in, or the Q-tip). Although it does fizz when poured into the drain. It seems to zero in on organic material. I am guessing this is because: - my skin has an oily (i.e. water repellant) coating that the peroxide can't react on/with, or - the wound has chemically active components that normal skin will not expose, or - the wound has physically reactive components - like the miscroscopic nicks in a champagne glass that serve as bubble nurseries (I forget the name) 4] Also, why does it not spontaneously revert to water in the bottle? Even over a long time? Thoughts?