Which Gases are the Most Toxic?

I have had carbon monoxide poisoning before. Do NOT recommend! Get the damn detector.

While visiting my aunt, her furnace had apparently malfunctioned in the middle of the night. I woke up one morning to find that I had a splitting headache. I have migraines, so this wasn't uncommon. I noticed that the pets had all been sick overnight too, but I was late and panicking about the exam I had first thing in the morning, so I dragged myself to school. Halfway through the first period, I got called to the office. Turns out my aunt and cousins had woken up and realized that something was very wrong, and were diagnosed with CO poisoning. They had me go immediately to the hospital for treatment.

Again, DO NOT fool around with CO poisoning!

NCl3 goes "BANG!" too!

POCl2 was the first gas used in warfare (U.S. Civil War).

ClO2 is ALSO explosive.

C⁴F⁸ 10 times more toxic than phosgene, I'm sure it should be in S

Everything is a gas if you get it hot enough

dogs CANNOT smell carbon monoxide, it has no scent. where did you hear this? stick to a proper CO detector.

I worked with Di-germane , was told if you smell fish you are already dead

As a welder ive gotten the joy of smelling ozone before. Ive found in small quantities it smells similar to a distant storm. Though more concentrated it starts to smell like burning wires and wire insulation mixed with chlorine bleach. Breath that for a couple hours and your lungs start feeling like they’ve been grazed. Among other effects Dont recommend

Hydrogen sulfide is also produced by sagrass algae when they stack on caribbean islands beaches, we have a device that measure it's amount to show it on our weather TV shows.

I just saw a story where three people and a dog died in a hole in the ground, a cistern, that was full of hydrogen sulfide

The fbi agent watching you be like you be like

Nice to hear your perspective of how toxic different gases are!
I always check LD50 and LC50 to understand if I could accidentally die or if I have to intentionally ingest a noticable (more or less intentional) amount. Anything I can't smell before it becomes a real danger, anything that could kill me if 50mg or less is ingested and anything that could spontanously explode even if it is isolated I deem dangerous and rarely worth playing with.

Thanks for great videos!!

Look im just a microbio labtech, so I'm out of my element.

But I feel like if you can smell it and not die, then Ozone doesn't deserve to be in S teir

When you hear fluorine, you know it’s bad.

Bromine should be higher. Your video title doesn't say which toxic gases are visible. Why does its color even come into play?

I would have placed Carbon Monoxide higher on the tier list because of how easily it is accidentally generated along with it having no odor.

Carbon monoxide I never had it but I had another chemical in this video I think

Carbon monoxide I’ve heard of it

Hyrdrogen cyanide is cursed.

Well shit man ive been taking sniffs off my formaldehyde since you put it in c. Cool to huff.

How my experience with chlorine, fluorine, bromide, radon and carbon monoxide i think fluorine was the worst

There's only one thing I want to know? is where can I purchase any one of these gases. I prefer the most deadly of these gases. I want to kill a very large number of people all at once. and I also need a hazmat suit. and probably oxygen.

Ozone absolutely deserves it's S tier ranking. I was exposed to ozone a few years ago from one of those ozone water purifiers. I don't know the level of exposure I had but within about 15 minutes I had an awful headache, it became harder to breath and I noticed I was starting to wheeze. I did have the machine on under the stove range with the fan on and a window open so I thought that would be safe, but it wasn't. Luckily I was able to turn the machine off, get to fresh air, and ventilate the area before anything more serious happened. A lot of people use these water and air purifiers that use ozone without being aware that ozone is very poisonous and readily attacks lung tissue. As consumers we tend to have a large amount of trust that the products we buy are safe, and, frankly we shouldn't.

How bad is ozone?! I use ozone generators for cleaning

I heard stories where multiple farmers and a dog died in a “sh*t pit” do to H-sulfide

Interesting how nitric oxide can be toxic, but is necessary for function in your body (transporting blood to muscles)

More people have died because of breathing in water than any of these, so water is S

My family has a defective gas oven that makes just barely enough CO to trip a detector. It's never made any of us sick, but the CO detector would scream every time we baked things, so we unplugged it until we get around to replacing the oven.

Not an optimal safety decision, but it's not the first risk I've ever taken for convenience, and it probably won't be the last.

i wouldn't put radon or tritium all that high.
sure they're radioactive and Schneeberg disease is terrible, but then you have to consider that radioactive gas is a gamble, it might give you cancer, but it also might not, so unless you live in a basement full of that stuff for years, you'll probably be fine.

also ammonia really deserves to be higher up on that list, i have been working with that stuff a lot, even with a mask, gloves and safety glasses that shit was nasty, because ammonia makes ammonium hydroxide when it comes in contact with water, so it'll just start burning your eyes and any piece of skin that has sweat on it, most goggles won't help because they have ventilation holes to keep them from fogging up.

Wikipedia give 4-4-3 for diborane.

The fart I had last night seemed to just kill my wife. I was dying laughing, she ran out of the room, and didn't come back, then in bed she farted, and just about killed me with her gas

Thank you for making me check the alarm, it works just fine. Currently watching the rest of the video while waiting for my ears to stop ringing 🫠

Everyone who has ever worked in producing wine or sparkling wine has an insane story about working with SO2. Due to it being extremely unpleasant even in low concentrations, it's relatively safe to work with, especially compared to CO2

nitrous oxide is also a signaling molecule in the body

Doesnt Osmium tetroxide etch your eyeballs, blinding you? Maybe that's not as bad as some of the others but that's nothing to scoff at.

During mr "reacreational chemistry" days in 19650's, I regularly made acetic anhydride by reacting ketene with glacial acetic acid, Sur,e it's very toxoc, but easy to detect by odor, so it can be handled safely, I am hugely more terrified by HF than by ketene.
Set some isopropanol aflame and blow it out. there is a bad smell — that's a few ppb of ketene.

You have probably smelled phosphine. It is the odor of commercial cylinde acxtylene;mor acetylene gdenerated from CaC3. It reeks at ppb levels, and at 1ppm smells like death.

I would 100 % rather breathe in HCl than Br2 or ClO2.

I would've wished if you had also included ClF5, but I can understand if you believe it's too similar to ClF3.

Trichloramine is very explodey tho

When I was working at a battery store, I was building a battery pack for an emergency light. Right on the first spot weld, I blew a hole in a Lithium Thionyl Chloride battery. It was not the most exciting experience.

Basil gases

Overwatch is number 1

honestly i think formaldehyde should be even lower, perhaps f tier, as most American school students will come across a cadaver or lab in their schooling that's been preserved with formalin

What is the meaning of S / A / ... / F?