Helium 0.1786 g/L Hydrogen 0.08988 g/L Air 1.275 g/L This stuff is six times lighter than air so 0.2 g/L or there about. Both Helium and Hydrogen are lighter

Helium 0.1786 g/L Hydrogen 0.08988 g/L Air 1.275 g/L This stuff is six times lighter than air so 0.2 g/L or there about. Both Helium and Hydrogen are lighter than this stuff. Considering the explosive reintroduction of air thing being pretty equivalent to the other two what makes this theoretically better?