<unk> s are<unk>  compounds containing the<unk>  functional group (ROOR'). If the R' is hydrogen, the compound is called an<unk>  hydroperoxide. Peresters have general structure RC(O)OOR.
The O-O bond easily breaks and forms free radicals of the form RO·. This makes<unk> s useful as catalysts for some types of polymerisation, such as the epoxy resins used in glass-reinforced plastics. MEKP and benzoyl<unk>  are commonly used for this purpose. However, the same property also means that<unk> s can either intentionally or unintentionally initiate explosive polymerisation in materials with unsaturated chemical bonds, and this process has been used in explosives.
Most<unk> s are highly flammable, explosive materials, often powerful and volatile. As little as 5 milligrams of diethyl ether<unk>  can shatter glass chemical apparatuses.<unk> s, like their inorganic counterparts, are powerful bleaching agents.
Organic peroxide
4-Nitroquinoline 1-oxide
Nitrazine
Trichloroethylene
Formaldehyde
Halogenated ether
Nitrobenzene
Vinyl chloride