The target of a Kree genetic experiment, Robert Hunter gained the ability to explode and reconstitute himself at will. The Kree sent their new agent to steal a lethal nerve gas under the protection of Carol Danvers, bringing Nitro into conflict with Captain Marvel. Marvel was able to disperse Nitro’s molecules but exposure to the nerve agent and Nitro’s energies eventually led to Marvel’s death. Nitro was eventually able to reconstitute himself and has since worked as mercenary for a variety of people including Count Nefaria and the Kingpin.
Nitro can explode with a force equivalent to that of 250 lbs. of TNT, and can then reconstitute his body. He can control the explosions so that either all or part of his body explodes.