Percentage of Hydrogen Peroxide

#### **Figure 2.**

*Fluctuations in H2O2 Concentration. Adapted from Hultman et al. [33] the concentration of hydrogen peroxide changes throughout different states of matter. When vapor condenses onto a surface the peroxide is more likely to enter the liquid state than the water vapor. This results in surface concentrations significantly higher than the original solution concentration. Concentrations exceeding 45% H2O2 are higher than the recommended maximum concentration for suitable interaction with other materials. In this manner a 35% solution that has been vaporized and condensed out on surfaces can reach concentrations of 77.8% H2O2 [33].*
