# Is hydroperoxyl radical(HO2) toxic to the human body, or even flammable?

I understand that radicals are damaging to cells, due to their high chemical reactivity. Though I do not know whether they are flammable in any level.

• Flammability is a property of compounds. A radical can't be flammable, much like it can't be happy or thoughtful. – Ivan Neretin Jan 6 '17 at 6:19

$\ce{HO2 + HO2 -> H2O2 + O2 }$