In m Anne Lurie wrote:
To the best of my knowledge, hydrogen peroxide is NOT synonymous with
hydrogen dioxide -- any more than carbon monoxide can be equated
with carbon dioxide!!!

Anne, you're right. Hydrogen dioxide is simply water - H20. Hydrogen
PERoxide is H202, i.e. one hydrogen per each oxygen atom. It
biodegrades to water plus oxygen quite easily.

If you want to know more, follow this boring link :-)
http://www.h2o2.com/intro/overview.html