Superoxol is:

Superoxol - 5 parts H2O2 : 1 part ether Hydrogen peroxide is a powerful oxidizer that is available in various strengths, but 30% to 35% stabilized solutions (Superoxol, Perhydrol) are the most common.  These high-concentration solutions must be handled with care because they are: Unstable, lose oxygen quickly, and may explode unless they are refrigerated and kept in a dark container. Also, these are caustic chemicals and will burn tissue on contact.