As only medical staff and dentists today are legally allowed to buy the pure gas, the recreational use is also believed to be somewhat limited.

The pure gas is completely absorbed by alkali solutions.

So perhaps one pure gas would have less conversion of pressure changes to heat.

After all, the stink chemical is a liquid that can evaporate, not a pure gas.

Much of this is pure political gas.

A gas mixture would contain a variety of pure gases much like the air.

Is it pure inert gas, clean air, or some random dirty enviroment?

Combining with pure inert gasses is a very good suggestion.

Breathing the pure gas helped settle his stomach and his nerves.

In 1914 he showed that pure gases could scatter light.