A few days ago I wrote about sodium azide, a nasty chemical that has been put to a nice use. As usual, io9 commenters one-upped me by bringing up dioxygen difluoride — also known as Satan’s Kimchi, or FOOF. Learn all about the chemical that requires you risk life and limb just to synthesize it.
Dioxygen difluoride is made up of two fluorine atoms and two oxygen atoms – earning it the nickname FOOF. It sounds simple, but fluorine isn’t an easy chemical to work with under any circumstances, and it can’t be forced into this particular combination without a 700 degree heating block.