One thing to beware of, however: I had a bottle in my vehicle which froze (this is North Dakota), and some of the H2O2 leaked and got on my finger (at a much higher concentration than 3%).
That was decidedly unpleasant and is something to be avoided.
Clean With Hydrogen Peroxide or Alcohol? FALSE
Using hydrogen peroxide or rubbing alcohol to clean an injury can actually harm the tissue and delay healing. The best way to clean a minor wound is with cool running water and mild soap. Rinse the wound for at least five minutes to remove dirt, debris, and bacteria. Wounds that are large, deep, or bleeding nonstop should be treated by a professional.
http://www.webmd.com/a-to-z-guides/wound-care-10/slideshow-wound-care-dos-and-donts
High concentrations of H2O2 can be really nasty. Hope you weren’t too badly hurt.