Here’s a fun fact, courtesy Wikipedia, about the chemical dicyanoacetylene:
Because of its high endothermic heat of formation, it can explode to carbon powder and nitrogen gas, and it burns in oxygen with a bright blue-white flame at a temperature of 5260 K (4990 °C, 9010 °F), which is the hottest flame of any chemical.
Nine-thousand-friggen-degrees. Yow. Of course, you have to keep it from getting mad at you and exploding on its own, apparently purely out of spite. Not only is it an explosive molecule on its own, it appears to be fairly sensitive.
That’s with oxygen. One wonders what it would do with fluorine. Or, just to be entertaining, how about FOOF: dioxygen difluoride, also known as “Satan’s kimchi.”
For comparison: the *boiling* point of tungsten is 10031 °F, that of rhenium is 10105 °F. Tungsten melts at 6192 °F. So a dicyanoacetylene flame would turn tungsten, a metal used to protect re-entry vehicles and rocket engines from horrific heating, into a nicely flowing puddle of liquid hatred.