Helium is not a flammable or explosive gas. Helium is an inert gas, which means that it is very stable and not very reactive. A balloon filled with helium will not explode.

Why do helium balloons explode?

This is because helium is less dense. Because helium is lighter that air, a helium balloon rises, just as an air bubble rises in more dense water. ... Helium is a special gas called a Noble Gas, which means it doesn't burn. When a match is held near a helium-filled balloon, the balloon pops.

Is it safe to keep helium balloons in room?

Helium is perfectly safe in balloons and safe when balloons are deflated in open and well-ventilated areas but, inhaling it from balloons can be dangerous. Helium displaces oxygen in your lungs when you inhale it, which can cause suffocation and you won't even realize it.