什么东西燃烧时温度最高？

肼，火箭的燃料。如果没有高的热值是不会选作火箭燃料的，它的燃烧温度可大3000-4000摄氏度。

吉尼斯记录是：
二氰乙炔在氧气中燃烧可以达到5260 K (4990 °C, 9010 °F)。

Dicyanoacetylene (also carbon subnitride, IUPAC but-2-ynedinitrile), 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, dicyanoacetylene 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 (4990 °C, 9010 °F),[1] which is the hottest flame of any chemical, according to Guinness World Records.

找到了一段话：

氧炔焰3000°C.

（CN）2 氰焰更高4525 °C (8180 °F)
这里提到4800K，

燃烧：
(CN)2 + O2 = 2CO + N2

Because of the high stability of the combustion products, CO and N2, the flame temper