Method Nitrous oxide as a method?

[sm1the]

So tilting your head parallel to the floor can counter gas leaking down.
The other concern is the boiling point for this gas is -88c !, use an insulated hose or let the gas in bag warm before use?.

So tilting your head parallel to the floor can counter gas leaking down,thanks.

The other concern is the boiling point for this gas is -88c !, I don't know if this is tolerable(instant frostbite to deal with if u fail)you can use an insulated hose or let the gas in bag warm before use I guess.
As far as bags go,LLDPE (not LDPE) is the material I chose for lowest gas permeation,tear resistance and accessibility(55x 62cm,50micron).

Is there anyway to tell if you got too much air in the bag(after sealing at neck)?.
Is it possible perhaps that if say after a certain time and u are still conscious it means you should consider that too much air entered and abort/start over?.
I could always pump gas while wearing the bag(sealed at neck with small diameter hose inserted at neck area and removed after filling) but having no experience with this gas I'm concerned about frostbite(if I fail)?.

 

[BullsDon'tFly]

Is there anyway to tell if you got too much air in the bag(after sealing at neck)?.
Is it possible perhaps that if say after a certain time and u are still conscious it means you should consider that too much air entered and abort/start over?.
I could always pump gas while wearing the bag(sealed at neck with small diameter hose inserted at neck area and removed after filling) but having no experience with this gas I'm concerned about frostbite(if I fail)?.

The larger the bag, the smaller any leak will affect it.

I don't want to make claims about maximum time required to lose consciousness.

I don't think you should worry about frostbite, no one using compressed gasses mentioned it as a danger. The gas inside the tank is at thermal equilibrium with the room (if I'm not mistaken), but it is contained at around 100x atmospheric pressure. When you let it out, pressure difference between the inert gas and normal air makes it expand and, thus, cool down, but the cooling isn't determined by its vapour point. But even if so, since this method requires to fill the bag before inhaling the gas, one can simply wait for the gas inside the bag to reach room temperature. I don't think it will be necessary tho.

 

[finallyhopeless]

A friend of a friend recently tried to ctb with nitrous, they ended up passed out in their room for multiple days before they were found and ultimately survived. However, the way they were laying cut off circulation to one of their legs which then had to be amputated. Be careful.

 

[Intoxicated]

Is there anyway to tell if you got too much air in the bag(after sealing at neck)?.
Is it possible perhaps that if say after a certain time and u are still conscious it means you should consider that too much air entered and abort/start over?.

Being conscious doesn't mean that you can use your hands to do something meaningful. The typical chain of events leading to hypoxic LOC is:

feeling normally -> reduced level of consciousness / lightheadedness / the sense of impending loss of consciousness (continues until full loss of consciousness) -> partial loss of voluntary control over many of your muscles -> full loss of voluntary control over your muscles -> full loss of consciousness.

Trying to unseal the bag after entering the state of lightheadedness may lead to inability to complete the unsealing due to loss of proper understanding of what you're doing and/or loss of proper control over your hands. Improper actions may lead to hypoxic injury without CTB. After the bag is sealed and breathing with nitrous has started, waiting no matter what seems to be the only safe option.

but having no experience with this gas I'm concerned about frostbite(if I fail)?.

If you're going to CTB in a place where the ambient temperature is about -10 °C or below, then thinking about frostbites could make sense.

 

[BullsDon'tFly]

A friend of a friend recently tried to ctb with nitrous, they ended up passed out in their room for multiple days before they were found and ultimately survived. However, the way they were laying cut off circulation to one of their legs which then had to be amputated. Be careful.

No brain damage from hypoxia but amputation for not sitting straight? One of the strangest outcomes ever. I feel sorry for him.

 

[sm1the]

Being conscious doesn't mean that you can use your hands to do something meaningful. The typical chain of events leading to hypoxic LOC is:

feeling normally -> reduced level of consciousness / lightheadedness / the sense of impending loss of consciousness (continues until full loss of consciousness) -> partial loss of voluntary control over many of your muscles -> full loss of voluntary control over your muscles -> full loss of consciousness.

Trying to unseal the bag after entering the state of lightheadedness may lead to inability to complete the unsealing due to loss of proper understanding of what you're doing and/or loss of proper control over your hands. Improper actions may lead to hypoxic injury without CTB. After the bag is sealed and breathing with nitrous has started, waiting no matter what seems to be the only safe option.

If you're going to CTB in a place where the ambient temperature is about -10 °C or below, then thinking about frostbites could make sense.

Thanks,those are good safety points in terms of avoiding permanent Injury if u fail.
I think I will pull the empty bag down to neck and use something tight and elasticated to semi-seal bag to neck(air to be squeezed out while putting the bag on or after elastic applied at neck),
hose(attached to cylinder, regulator)inserted at neck ,
fill(open the elastic/bag with finger a bit to purge any air with gas maybe?).
After 3/4 (?) full,pull out hose, I will use a reusable (edges are rounder)long zip tie .

How does this sound?.
Gas would be coming directly at me so I really hope it won't be sub-zero temperatures

The larger the bag, the smaller any leak will affect it.

I don't want to make claims about maximum time required to lose consciousness.

I don't think you should worry about frostbite, no one using compressed gasses mentioned it as a danger. The gas inside the tank is at thermal equilibrium with the room (if I'm not mistaken), but it is contained at around 100x atmospheric pressure. When you let it out, pressure difference between the inert gas and normal air makes it expand and, thus, cool down, but the cooling isn't determined by its vapour point. But even if so, since this method requires to fill the bag before inhaling the gas, one can simply wait for the gas inside the bag to reach room temperature. I don't think it will be necessary tho.

I have searched for details about this and there are many contradicting answers.
Ideally,I would think pumping n2o directly into the bag(sealed system,non-continuous gas) would minimize contamination, but there the freezing temperature concern is much more valid..

 

[sm1the]

Being conscious doesn't mean that you can use your hands to do something meaningful. The typical chain of events leading to hypoxic LOC is:

feeling normally -> reduced level of consciousness / lightheadedness / the sense of impending loss of consciousness (continues until full loss of consciousness) -> partial loss of voluntary control over many of your muscles -> full loss of voluntary control over your muscles -> full loss of consciousness.

Trying to unseal the bag after entering the state of lightheadedness may lead to inability to complete the unsealing due to loss of proper understanding of what you're doing and/or loss of proper control over your hands. Improper actions may lead to hypoxic injury without CTB. After the bag is sealed and breathing with nitrous has started, waiting no matter what seems to be the only safe option.

If you're going to CTB in a place where the ambient temperature is about -10 °C or below, then thinking about frostbites could make sense.

Hey how do u think this sounds?
pull the empty bag down to neck and use something tight and elasticated to semi-seal bag to neck(air to be squeezed out while putting the bag on or after elastic applied at neck),
hose(attached to cylinder, regulator)inserted at neck ,
fill(open the elastic/bag with finger a bit to purge/flush any air with gas (maybe?).
After 3/4 (?) full,pull out hose, I will use a reusable (edges are rounder in these)long zip tie .


Gas would be coming directly at me so I really hope it won't be sub-zero temperatures

 

[Intoxicated]

Hey how do u think this sounds?
pull the empty bag down to neck and use something tight and elasticated to semi-seal bag to neck(air to be squeezed out while putting the bag on or after elastic applied at neck),
hose(attached to cylinder, regulator)inserted at neck ,
fill(open the elastic/bag with finger a bit to purge/flush any air with gas (maybe?).
After 3/4 (?) full,pull out hose, I will use a reusable (edges are rounder in these)long zip tie .

That plan may require holding breath for the period of filling the bag and for the period of sealing it. If it's OK for you, then it could work.

 

[sm1the]

That plan may require holding breath for the period of filling the bag and for the period of sealing it. If it's OK for you, then it could work.

Thanks , yes hyperventilation for 2 minutes should be enough I hope.
Still weighing up this way vs pre-filling and then side ways head insertion.
Hope u are doing relatively OK.

 

[iamgood]

During the first ~20 seconds of breath holding I perceived nothing unusual, except for slight taste of the gas. Then I had clouding of consciousness, ringing in the ears, dimness and blurriness of vision, growing desire to resume breathing, tingling sensations and numbness in the face and especially lips (in some tests, such perceptions were also noticeable in fingers and palms of hands), loss of the sense of gravity and loss of the sense of my body. When I resumed breathing shortly after the onset of symptoms, a near-blackout state was reached, followed by gradual recovery. When I held breath long enough, loss of consciousness eventually occurred.

hi , if i breath lets say 95 to 100 percen argon for two breaths and then hold air how long i can accurately move my fingers for instance to tigten a bag , tigthen the knot etc. can i get about 30 seconds or so .

 

[sm1the]

That plan may require holding breath for the period of filling the bag and for the period of sealing it. If it's OK for you, then it could work.

Can you tell me again how full the bag needs to be in n2o closed system?.
I seem to have forgotten and can't find the post where is mentioned(I searched a fair bit).Sorry for asking you something that I think u already mentioned previously.
Have you ever thought of incorporating a cap (with peak,no sharp edges) and/or surgical mask into the setup?.Mask could stop bag sticking to face and cap may do the same but also create more breathing room (around mouth,nose).

 

[Intoxicated]

hi , if i breath lets say 95 to 100 percen argon for two breaths and then hold air how long i can accurately move my fingers for instance to tigten a bag , tigthen the knot etc. can i get about 30 seconds or so .

Different breaths can produce different results. Deep exhales eliminate more oxygen from the lungs than shallow exhales would do. Deep inhales dilute the residual oxygen in the lungs more than shallow inhales would do. Also hyperventilation with air before inhaling an asphyxiant gas replaces some amount of carbon dioxide in the lungs with oxygen. Losing consciousness after hyperventilation with air followed by a single deep inhalation of an asphyxiant is likely harder than after the same single deep inhalation of the asphyxiant without prior hyperventilation.

Can you tell me again how full the bag needs to be in n2o closed system?.

Initially it should be nearly full. If you CTB at home, removing approximately 1/5 should give enough room for further thermal gas expansion. 25% expansion (from x0.8 to x1.0) corresponds to heating from -25 °C to +37 °C, provided that the mass of the gas is not changed, which is not the case when you breathe N₂O, because it's partially dissolved in blood plasma, so the expansion is at least partially negated by loss of the gas.

Have you ever thought of incorporating a cap (with peak,no sharp edges) and/or surgical mask into the setup?.Mask could stop bag sticking to face and cap may do the same but also create more breathing room (around mouth,nose).

If the bag is large and inflated, that seems potentially doing a somewhat opposite to allowing maximally free breathing through the mouth. Restricted breathing is undesirable because of the hypoxic ventilatory response. The idea with mask is worth considering if experiments with the bag (filled with plain air) confirm that sticking to face really takes place.

 

[sm1the]

Different breaths can produce different results. Deep exhales eliminate more oxygen from the lungs than shallow exhales would do. Deep inhales dilute the residual oxygen in the lungs more than shallow inhales would do. Also hyperventilation with air before inhaling an asphyxiant gas replaces some amount of carbon dioxide in the lungs with oxygen. Losing consciousness after hyperventilation with air followed by a single deep inhalation of an asphyxiant is likely harder than after the same single deep inhalation of the asphyxiant without prior hyperventilation.


Initially it should be nearly full. If you CTB at home, removing approximately 1/5 should give enough room for further thermal gas expansion. 25% expansion (from x0.8 to x1.0) corresponds to heating from -25 °C to +37 °C, provided that the mass of the gas is not changed, which is not the case when you breathe N₂O, because it's partially dissolved in blood plasma, so the expansion is at least partially negated by loss of the gas.

If the bag is large and inflated, that seems potentially doing a somewhat opposite to allowing maximally free breathing through the mouth. Restricted breathing is undesirable because of the hypoxic ventilatory response. The idea with mask is worth considering if experiments with the bag (filled with plain air) confirm that sticking to face really takes place.

So fill completely and bring the gas volume down to 80% by the time bag is sealed onto neck?.
I'm not certain it will stick to the face,I was going on info seen on books.
If it does stick or even to create space to breathe maybe a cap may work though,as long as there are no sharp edges(this can be easily fixed with tape and burring).
If lldpe or ldpe bags over say 0.005mm thickness are used then it shouldn't tear anyway.Just a thought

 

[OzymandiAsh]

So, I managed to get a hold of two 615g (700g) N20 cylinders. Not only that, but they came with small, free discharge nozzles!!! So it seems I don't have to worry about buying a regulator which can be very expensive and overcomplicate things. @Jello Biafra said he preferred mini regulators anyway, less fuss, but these are even smaller, simpler, and I assume do roughly the same job. I haven't seen him around for a while but he's the one who put me on this trail, RIP if he has already caught the bus. He liked @Intoxicated s posts.

I gave it a small test and released a tiny amount of gas into a black bin bag. Works like a charm. Also I got a small, pleasant effect even from that tiny amount of gas, which makes me eager to try it at a higher amount.

It did not seem extremely cold either, so I am less concerned about potential frostbite or whatever, although the nozzle did feel cold after use. I'll probably avoid using it too close to my face and skin.

@Intoxicated would be grateful for your input. Will these 2 x 615g N20 cylinders be enough for the mission?
Can I safely release the gas in small amounts even on my skin/face? (There is a burn warning on the cans but I might try anyway and see what happens... I don't mind a little burning!l)
Is it totally necessary that the black bin bag I will use (or any other type of bag) is flat and empty before inflating with N20, to ensure minimal air is inside? I guess this is the ideal but it might be tricky to work out practically how to inflate the bag and get it around my head with minimal air.

 

[OzymandiAsh]

Answered my second question by testing the cylinder by directly taking the nitrous into my mouth from the slightly opened valve and nozzle.

No noted negative effects. I can immediately see why people like it. I guess socially it could be conducive to a good laugh in some ways, but personally I just feel a bit of dissociation, detachment from my body and relief, mainly.
It does make me feel a bit faint even at lower amounts, so I can see this working and can see myself going unconscious at higher amounts.
Feels light, and like release.

No serious negative effects on my skin, lips and mouth, but I turned the discharge nozzle only slightly to release a small amount of gas at a small pressure, then turned it back and closed it when I was done. I do not recommend doing this if you are an idiot who cannot keep the pressure down, because more pressure can easily fuck up your skin, teeth, lungs and so on. But at a small amount of pressure, it's not extremely cold, and has a slightly metallic or icy taste reminiscent of whipped cream cans and dental appointments where they spray that high pressured air (or nitrous idk which) all around your mouth.

Hell yeah. Might have to buy another cylinder just so I can waste one getting high and pushing the boundary before I CTB (hopefully within a couple months time).

 

[sm1the]

Different breaths can produce different results. Deep exhales eliminate more oxygen from the lungs than shallow exhales would do. Deep inhales dilute the residual oxygen in the lungs more than shallow inhales would do. Also hyperventilation with air before inhaling an asphyxiant gas replaces some amount of carbon dioxide in the lungs with oxygen. Losing consciousness after hyperventilation with air followed by a single deep inhalation of an asphyxiant is likely harder than after the same single deep inhalation of the asphyxiant without prior hyperventilation.


Initially it should be nearly full. If you CTB at home, removing approximately 1/5 should give enough room for further thermal gas expansion. 25% expansion (from x0.8 to x1.0) corresponds to heating from -25 °C to +37 °C, provided that the mass of the gas is not changed, which is not the case when you breathe N₂O, because it's partially dissolved in blood plasma, so the expansion is at least partially negated by loss of the gas.

If the bag is large and inflated, that seems potentially doing a somewhat opposite to allowing maximally free breathing through the mouth. Restricted breathing is undesirable because of the hypoxic ventilatory response. The idea with mask is worth considering if experiments with the bag (filled with plain air) confirm that sticking to face really takes place.

Are u planning on doing a method post
Like u see for other methods?.
I think a lot of ppl suffering in pain are probably hoping u would.

 

[Intoxicated]

@Intoxicated would be grateful for your input. Will these 2 x 615g N20 cylinders be enough for the mission?

When using closed (unventilated) setups, people died with much smaller amounts of N₂O

https://i.sanctioned-suicide.net/images/2025/02/221150_Fatal_Nitrous_Oxide_Intoxication.pdf

https://i.sanctioned-suicide.net/images/2025/02/221151_Death_from_Nitrous_Oxide.pdf (Case Report 1)
https://i.sanctioned-suicide.net/im...w_common_are_suicides_using_nitrous_oxide.pdf (Case 2)

https://i.sanctioned-suicide.net/images/2026/02/256983_Fatal_Nitrous_Oxide_Abuse.pdf

Can I safely release the gas in small amounts even on my skin/face? (There is a burn warning on the cans but I might try anyway and see what happens... I don't mind a little burning!l)

At high temperatures, N₂O decomposes into nitrogen and oxygen, and the produced oxygen can support combustion. This is why N₂O is considered an oxidizer. At typical room temperatures, it doesn't work as an oxidizing agent and it's safe to use.

Cold burns (frostbites) are possible in case if large amounts of the gas are evaporated in a short time interval, causing rapid decrease in the temperature of metal parts which you touch or gas which you inhale. It's worth noting though that people can breathe air that is as cold as -30 °C or even -40 °C without getting frostbites, so you'd need rather extreme cold in order to get cold burns via inhalation.

Is it totally necessary that the black bin bag I will use (or any other type of bag) is flat and empty before inflating with N20, to ensure minimal air is inside? I guess this is the ideal but it might be tricky to work out practically how to inflate the bag and get it around my head with minimal air.

As long as the concentration of air in nitrous oxide does not exceed 25 - 30%, loss of consciousness followed by surgical anesthesia should happen quickly

https://i.sanctioned-suicide.net/im...t_-_Anaesthetics_and_their_administration.pdf (pp 254 - 255)

If you add more than 30% air in the mixture, complications are possible, but you'd probably still be able to successfully CTB. N₂O is known to mitigate CO₂-induced sense of shortness of breath and anxiety. If you have alprazolam, you can use it to suppress anxiety even more

Carbon Dioxide Sensitivity in Panic Anxiety | 10.1001/archpsyc.1986.01800090090013_Science Hub

tesble.com

Alprazolam blockade of CO2-provoked panic in patients with panic disorder | 10.1176/ajp.151.8.1220_Science Hub

tesble.com

Delayed loss of consciousness due to presence of too much oxygen is also associated with a higher risk of inducing nausea, retching, and vomiting, so antiemetics can be advised in case you're concerned about a possibility of having too much air in your setup.

Are u planning on doing a method post
Like u see for other methods?.
I think a lot of ppl suffering in pain are probably hoping u would.

IDK. I'm afraid of banning N₂O sales in case if deaths from it become significantly more frequent. I think, smart people should be able to use my hints wisely.

 

[OzymandiAsh]

Are u planning on doing a method post
Like u see for other methods?.
I think a lot of ppl suffering in pain are probably hoping u would.

Initially when I saw your question I thought it was directed to me, and I was going to answer similarly to Intoxicated. Maybe a megathread would be useful, but honestly it is already a very simple method that anyone determined to CTB by this route should be able to pull off sooner or later, and one of the several threads already about nitrous oxide should be enough to address any questions and concerns and circulate the method without making too much noise and getting it scrutinised by the tyrannical overlords in government...

When using closed (unventilated) setups, people died with much smaller amounts of N₂O

https://i.sanctioned-suicide.net/images/2025/02/221150_Fatal_Nitrous_Oxide_Intoxication.pdf

https://i.sanctioned-suicide.net/images/2025/02/221151_Death_from_Nitrous_Oxide.pdf (Case Report 1)
https://i.sanctioned-suicide.net/im...w_common_are_suicides_using_nitrous_oxide.pdf (Case 2)

https://i.sanctioned-suicide.net/images/2026/02/256983_Fatal_Nitrous_Oxide_Abuse.pdf

At high temperatures, N₂O decomposes into nitrogen and oxygen, and the produced oxygen can support combustion. This is why N₂O is considered an oxidizer. At typical room temperatures, it doesn't work as an oxidizing agent and it's safe to use.

Cold burns (frostbites) are possible in case if large amounts of the gas are evaporated in a short time interval, causing rapid decrease in the temperature of metal parts which you touch or gas which you inhale. It's worth noting though that people can breathe air that is as cold as -30 °C or even -40 °C without getting frostbites, so you'd need rather extreme cold in order to get cold burns via inhalation.

As long as the concentration of air in nitrous oxide does not exceed 25 - 30%, loss of consciousness followed by surgical anesthesia should happen quickly

https://i.sanctioned-suicide.net/im...t_-_Anaesthetics_and_their_administration.pdf (pp 254 - 255)

If you add more than 30% air in the mixture, complications are possible, but you'd probably still be able to successfully CTB. N₂O is known to mitigate CO₂-induced sense of shortness of breath and anxiety. If you have alprazolam, you can use it to suppress anxiety even more

Carbon Dioxide Sensitivity in Panic Anxiety | 10.1001/archpsyc.1986.01800090090013_Science Hub

tesble.com

Alprazolam blockade of CO2-provoked panic in patients with panic disorder | 10.1176/ajp.151.8.1220_Science Hub

tesble.com

Delayed loss of consciousness due to presence of too much oxygen is also associated with a higher risk of inducing nausea, retching, and vomiting, so antiemetics can be advised in case you're concerned about a possibility of having too much air in your setup.

IDK. I'm afraid of banning N₂O sales in case if deaths from it become significantly more frequent. I think, smart people should be able to use my hints wisely.

Thank you!!! :) Maybe even one cylinder will be enough? Not sure if the amount needed varies though and maybe some people need a higher amount.

Will check the links soon and maybe do a bit of own research.

 

[Jello Biafra]

So, I managed to get a hold of two 615g (700g) N20 cylinders. Not only that, but they came with small, free discharge nozzles!!! So it seems I don't have to worry about buying a regulator which can be very expensive and overcomplicate things. @Jello Biafra said he preferred mini regulators anyway, less fuss, but these are even smaller, simpler, and I assume do roughly the same job. I haven't seen him around for a while but he's the one who put me on this trail, RIP if he has already caught the bus. He liked @Intoxicated s posts.

I gave it a small test and released a tiny amount of gas into a black bin bag. Works like a charm. Also I got a small, pleasant effect even from that tiny amount of gas, which makes me eager to try it at a higher amount.

It did not seem extremely cold either, so I am less concerned about potential frostbite or whatever, although the nozzle did feel cold after use. I'll probably avoid using it too close to my face and skin.

@Intoxicated would be grateful for your input. Will these 2 x 615g N20 cylinders be enough for the mission?
Can I safely release the gas in small amounts even on my skin/face? (There is a burn warning on the cans but I might try anyway and see what happens... I don't mind a little burning!l)
Is it totally necessary that the black bin bag I will use (or any other type of bag) is flat and empty before inflating with N20, to ensure minimal air is inside? I guess this is the ideal but it might be tricky to work out practically how to inflate the bag and get it around my head with minimal air.

Hey bud - I had trouble with my account here and ended up just deactivating it. As I had no idea that it was possible to reactivate an account, I tried to create a new one and for whatever reason was rejected.

Anyways, I was finally able to get my account back this morning, so I'm still here!

That's great you were able to source some N2O, as I know it's been regulated in the UK.

I think the little plastic nozzles you described comes with most cylinders of N2O. And as long as they seem to be working good for you getting a regulator is pointless unless you are going for the continuous flow method like exit bags and inert gasses.

Seems like you were also able to do some tests to get familiar with the substance. I really believe that N2O almost makes it too easy to ctb. Sure, there are some technicalities to it, but nothing that is as complicated as traditional exit bag inert gas methods. I think this is why most people dismiss it - they immediately think exit bag and think N2O will be just as complicated when it's not.

Further, I have read mixed reports of just how easy it is to breathe in 100% nitrogen or helium. That's the beauty of N2O and why so many die from it accidentally - you get no sense that something is wrong - no hypercapnia, no shortness of breath - it's basically the opposite of all of that.

I'll be back a little later tonight.

 

[sm1the]

This

So fill completely and bring the gas volume down to 80% by the time bag is sealed onto neck?.
I'm not certain it will stick to the face,I was going on info seen on books.
If it does stick or even to create space to breathe maybe a cap may work though,as long as there are no sharp edges(this can be easily fixed with tape and burring).
If lldpe or ldpe bags over say 0.005mm thickness are used then it shouldn't tear anyway.Just a thought

Should be 0.05mm(50 microns) and not 0.005mm(5 microns)!,0.005mm is incredibly thin.

 

[sm1the]

Initially when I saw your question I thought it was directed to me, and I was going to answer similarly to Intoxicated. Maybe a megathread would be useful, but honestly it is already a very simple method that anyone determined to CTB by this route should be able to pull off sooner or later, and one of the several threads already about nitrous oxide should be enough to address any questions and concerns and circulate the method without making too much noise and getting it scrutinised by the tyrannical overlords in government...



Thank you!!! :) Maybe even one cylinder will be enough? Not sure if the amount needed varies though and maybe some people need a higher amount.

Will check the links soon and maybe do a bit of own research.

A 650G cyl puts out roughly 325l of gas.
Even a large garbage bag is only 33l or so.1 cyl can fill maybe 10 of them.

When using closed (unventilated) setups, people died with much smaller amounts of N₂O

https://i.sanctioned-suicide.net/images/2025/02/221150_Fatal_Nitrous_Oxide_Intoxication.pdf

https://i.sanctioned-suicide.net/images/2025/02/221151_Death_from_Nitrous_Oxide.pdf (Case Report 1)
https://i.sanctioned-suicide.net/im...w_common_are_suicides_using_nitrous_oxide.pdf (Case 2)

https://i.sanctioned-suicide.net/images/2026/02/256983_Fatal_Nitrous_Oxide_Abuse.pdf

At high temperatures, N₂O decomposes into nitrogen and oxygen, and the produced oxygen can support combustion. This is why N₂O is considered an oxidizer. At typical room temperatures, it doesn't work as an oxidizing agent and it's safe to use.

Cold burns (frostbites) are possible in case if large amounts of the gas are evaporated in a short time interval, causing rapid decrease in the temperature of metal parts which you touch or gas which you inhale. It's worth noting though that people can breathe air that is as cold as -30 °C or even -40 °C without getting frostbites, so you'd need rather extreme cold in order to get cold burns via inhalation.

As long as the concentration of air in nitrous oxide does not exceed 25 - 30%, loss of consciousness followed by surgical anesthesia should happen quickly

https://i.sanctioned-suicide.net/im...t_-_Anaesthetics_and_their_administration.pdf (pp 254 - 255)

If you add more than 30% air in the mixture, complications are possible, but you'd probably still be able to successfully CTB. N₂O is known to mitigate CO₂-induced sense of shortness of breath and anxiety. If you have alprazolam, you can use it to suppress anxiety even more

Carbon Dioxide Sensitivity in Panic Anxiety | 10.1001/archpsyc.1986.01800090090013_Science Hub

tesble.com

Alprazolam blockade of CO2-provoked panic in patients with panic disorder | 10.1176/ajp.151.8.1220_Science Hub

tesble.com

Delayed loss of consciousness due to presence of too much oxygen is also associated with a higher risk of inducing nausea, retching, and vomiting, so antiemetics can be advised in case you're concerned about a possibility of having too much air in your setup.

IDK. I'm afraid of banning N₂O sales in case if deaths from it become significantly more frequent. I think, smart people should be able to use my hints wisely.

Yes of course, that's actually been concerning me too.
I read on the attachments u posted and elsewhere that spasms,convulsions related to O2 deficiency do take place. If so then maybe hands and feet needs restraining?.This is done for N2 as well.

 

[Jello Biafra]

A friend of a friend recently tried to ctb with nitrous, they ended up passed out in their room for multiple days before they were found and ultimately survived. However, the way they were laying cut off circulation to one of their legs which then had to be amputated. Be careful.

No offense but this story doesn't make any sense.

The mechanism in which N2O causes loss of consciousness is hypoxemia which leads to cerebral hypoxia. It would not be possible to "pass out for multiple days" suffering from cerebral hypoxia - the person would be dead after about 20 minutes.

If, on the other hand, there was oxygen keeping the person alive, consciousness would be regained and they would not be passed out for multiple days.

If they were using a mask of sort, or a plastic bag with a hole in it, where some amount of oxygen was being mixed with the nitrous, you would literally need several industrial sized tanks of nitrous all daisy chained together to be continuously running for "multiple days".

Whoever told you this story was either leaving something out, or got their story mixed up because there just is no possible way for it to happen the way you have described.

 

[Intoxicated]

I read on the attachments u posted and elsewhere that spasms,convulsions related to O2 deficiency do take place. If so then maybe hands and feet needs restraining?.This is done for N2 as well.

When thinking about convulsions, do you imagine people dancing like on the video below? )



I think, in reality, hypoxic convulsions would rather look like the ones shown here:



They might be concerning in case of using a ventilated setup, but a completely sealed bag should be sufficiently robust against such movements.

TL;DR: don't listen to "Push The Tempo" when attempting to CTB.

 

[OzymandiAsh]

Hey bud - I had trouble with my account here and ended up just deactivating it. As I had no idea that it was possible to reactivate an account, I tried to create a new one and for whatever reason was rejected.

Anyways, I was finally able to get my account back this morning, so I'm still here!

That's great you were able to source some N2O, as I know it's been regulated in the UK.

I think the little plastic nozzles you described comes with most cylinders of N2O. And as long as they seem to be working good for you getting a regulator is pointless unless you are going for the continuous flow method like exit bags and inert gasses.

Seems like you were also able to do some tests to get familiar with the substance. I really believe that N2O almost makes it too easy to ctb. Sure, there are some technicalities to it, but nothing that is as complicated as traditional exit bag inert gas methods. I think this is why most people dismiss it - they immediately think exit bag and think N2O will be just as complicated when it's not.

Further, I have read mixed reports of just how easy it is to breathe in 100% nitrogen or helium. That's the beauty of N2O and why so many die from it accidentally - you get no sense that something is wrong - no hypercapnia, no shortness of breath - it's basically the opposite of all of that.

I'll be back a little later tonight.

Good to see you back here, my friend! :)

A 650G cyl puts out roughly 325l of gas.
Even a large garbage bag is only 33l or so.1 cyl can fill maybe 10 of them.

Good point, although I wonder if the capacity of the bag is the same for gas as for liquid in litres?

If they were using a mask of sort, or a plastic bag with a hole in it, where some amount of oxygen was being mixed with the nitrous, you would literally need several industrial sized tanks of nitrous all daisy chained together to be continuously running for "multiple days".

But Intoxicated said otherwise about air mixing in?

"As long as the concentration of air in nitrous oxide does not exceed 25 - 30%, loss of consciousness followed by surgical anesthesia should happen quickly

https://i.sanctioned-suicide.net/im...t_-_Anaesthetics_and_their_administration.pdf (pp 254 - 255)

If you add more than 30% air in the mixture, complications are possible, but you'd probably still be able to successfully CTB. N₂O is known to mitigate CO₂-induced sense of shortness of breath and anxiety."

 

[Intoxicated]

But Intoxicated said otherwise about air mixing in?

"As long as the concentration of air in nitrous oxide does not exceed 25 - 30%, loss of consciousness followed by surgical anesthesia should happen quickly

https://i.sanctioned-suicide.net/im...t_-_Anaesthetics_and_their_administration.pdf (pp 254 - 255)

If you add more than 30% air in the mixture, complications are possible, but you'd probably still be able to successfully CTB. N₂O is known to mitigate CO₂-induced sense of shortness of breath and anxiety."

That was said in a different context. When the bag is properly sealed, you can eventually use up the residual oxygen to the point when its concentration will no longer be sufficient for maintaining life. In particular, breathing a gas mixture containing less than 6% O₂ at normal atmospheric pressure is fatal in a few minutes - see

Oxygen Deficiency Hazards and Asphyxiation

ehs.lbl.gov

25 - 30% air corresponds to ~5.2 - 6.3% O₂ (assuming that air contains 20.9% O₂) with ~19.8 - 23.7% N₂ & other gases.

The wonderful story about the survivor implies that the concentration of oxygen was sufficient for maintaining life in that case. In order to keep someone alive and sedated with N₂O, a constant supply of O₂ and N₂O is required (after administration of N₂O is stopped, its sedative effect wears off in a matter of minutes). A possibility of passing out for days from a reasonable amount of nitrous that could be used for a real CTB attempt seems rather unlikely.

 

[OzymandiAsh]

Ah I see, I read it as "you would need several tanks to mitigate any oxygen inflow" rather than "you would need several tanks of gas as well as oxygen inflow to keep someone alive but passed out for multiple days" for some reason. Brain fart.

 

[Intoxicated]

Does anyone have access to the full version?

A fatal case of accidental asphyxia following nitrous oxide inhalation and alcohol consumption - PubMed

Nitrous oxide (N₂O) abuse is becoming increasingly popular worldwide. Moreover, the use of N₂O combined with other substances, such as alcohol, is also common. Accidental deaths associated with N₂O abuse are rare in forensic practice, with most fatal cases...

pubmed.ncbi.nlm.nih.gov

 

[Jello Biafra]

Good to see you back here, my friend! :)


Good point, although I wonder if the capacity of the bag is the same for gas as for liquid in litres?



But Intoxicated said otherwise about air mixing in?

"As long as the concentration of air in nitrous oxide does not exceed 25 - 30%, loss of consciousness followed by surgical anesthesia should happen quickly

https://i.sanctioned-suicide.net/im...t_-_Anaesthetics_and_their_administration.pdf (pp 254 - 255)

If you add more than 30% air in the mixture, complications are possible, but you'd probably still be able to successfully CTB. N₂O is known to mitigate CO₂-induced sense of shortness of breath and anxiety."

I think Intoxicated already answered your question, however I will simply add what I mentioned to the person who made that post of the unbelievable story.

Certainly if oxygen was part of the mixture the person could survive for "multiple days", however this would require a consistent flow of N2O over multiple days, which would require a lot of industrial sized cylinders to be daisy changed together. The story just doesn't make any sense. N2O is not a general anesthetic that is causing someone to "pass out" in the same way that propofol or thiopental causes immediate loss of consciousness. N2O only causes loss of consciousness due to restricting the brain's oxygen supply. So, in this context, for someone to be "passed out for multiple days", this is inherently implying that the person was suffering from cerebral hypoxia "for multiple days". If the oxygen supply to your brain is enough to cause loss of consciousness, it's enough to terminate life. Loss of consciousness from hypoxia is simply a stage before death - unless some amount of oxygen is restored, nobody is surviving in a state like that for multiple hours, much less "multiple days". It's nonsense.

 

[sm1the]

I

Does anyone have access to the full version?

A fatal case of accidental asphyxia following nitrous oxide inhalation and alcohol consumption - PubMed

Nitrous oxide (N₂O) abuse is becoming increasingly popular worldwide. Moreover, the use of N₂O combined with other substances, such as alcohol, is also common. Accidental deaths associated with N₂O abuse are rare in forensic practice, with most fatal cases...

pubmed.ncbi.nlm.nih.gov

That's interesting they include prone positioning in COD.

 

[OzymandiAsh]

I

That's interesting they include prone positioning in COD.

Wrong thread??? I was just playing COD mobile though. But yeah what's the thread you meant to reply to? lol