Much hotter than thermite!
Quote: Carbon subnitride or dicyanoacetylene (C4N2) is a compound of carbon and nitrogen. It has a linear structure, NCCCCN, with alternating triple and single covalent bonds. In other words, it is acetylene with the two hydrogen atoms replaced by cyanide groups. . At room temperature, carbon subnitride is a clear liquid. 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 (4987 °C, 9008 °F),[1] which is the hottest flame of any chemical, according to Guinness World Records.
Five thousand degrees Celsius or nine thousand degrees Fahrenheit. Its so hot it doesn't melt steel - it vaporizes it! Allegedly the hottest chemical flame out there, twice as hot as your thermite!
It looks highly toxic and explosively unstable though.
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