carbon subnitride
...that, according to Guinness World Records, carbon subnitride burns with the hottest flame of any chemical, at 5260 K (4987 °C, 9008 °F)?
...that, according to <i id="mwA-w"><a href="./Guinness_World_Records" id="mwA-0" rel="mw:WikiLink" title="Guinness World Records">Guinness World Records</a></i>, <b id="mwA-4"><a class="mw-redirect" href="./Carbon_subnitride" id="mwA-8" rel="mw:WikiLink" title="Carbon subnitride">carbon subnitride</a></b> burns with the hottest <a href="./Flame" id="mwA_A" rel="mw:WikiLink" title="Flame">flame</a> of any chemical, at 5260 K (4987 °C, 9008 °F)?