[–] llm_nerd 3 days ago
[–] hkchad 3 days ago
[–] llm_nerd 3 days ago
Balloon helium is just helium, broadly, at 98%+ concentration. It has a tiny amount of atmospheric gas, mostly nitrogen, in it as there is no need to go too far with purifying it, but there is zero intention of making it any safer to inhale. It is basically accidental contaminants.
If you inhale 98%+ helium, the diffusion gradient reverses and oxygen floods out of your blood. Did this once as a kid and actually blacked out. This is functionally just as true at 98% helium with some nitrogen and a tiny amount of oxygen as it is with 99.9999% helium. The difference for inhalation is a wash.
Inhaling helium is not advised. The protection we have, such as in my case, is that invariably our rapid physiological response stops us from inhaling helium and oxygen can return.
If there is a shortage of helium, it's a shortage of all the same helium. But so long as it's treated as a novelty gas, and so long as it continues to just be wasted, it's hard to take claims of a shortage too seriously.
As a fun fact, the vast majority of helium on Earth is courtesy of the radioactive alpha decay chain starting from heavy elements like Uranium and Thorium. Helium got trapped by the same geological formations that trapped natural gas, hence why they're usually found together despite being from completely different processes.