"Pyrolysis of an oil product or natural gas leads to thermal blacks. ...Acetylene black is made by of acetylene. ...[P]reheated to 800°C ...acetylene is introduced and... because the pyrolysis is exothermic, the temperature... reaches ~2500°C. formation takes place... [800°C-~]2000°C. ...2000-2500°C induces partial of the carbon black. Due to... partial graphitic nature, acelylene blacks have... applications where good [electrical and thermal] conductivity... or... very low chemical reactivity is desirable."