How peroxides form
Organic solvents (liquids) are most susceptible to auto-oxidation to form peroxides. Solids, such as potassium, can also form peroxides, though the process is typically much slower. Gaseous PFCs typically do not form peroxides unless they become condensed into the liquid phase or upon transfer from original to secondary container.
The rate of peroxide formation is difficult to estimate, since the O-O bond can decompose to form products that may increase or decrease the rate of peroxide formation.
