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h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
hello, after an attempt to CTB last month my family is on high alert, meaning im not able to act, when i move out late next month, ill be proceeding with my plan, however ill be living in student accommodation, so i cant order N2 directly to my building as its a prohibited item, due to this, ill have to order it to a local pick up point

my problem is that the only nitrogen bottles ive seen on ebay are 2L (28 mins gas flow) or 9L (82 minutes) the 9L bottle i found comes with a regulator and tubing, but the only issue is that it weighs 15kg and is 82cm, so id have trouble transporting it, ive not got a car, so id have to get an uber from the pick up point, and carry it up some stairs to get to my room, would you recommend attempting to carry the 15kg bottle (im around 41kg) or just attempting to CTB with the 2L bottle? im not able to order gas directly from the supplier as i have no car and I doubt they would hand it over if i told them i was transporting it in an uber, also the 9L bottle is 82cm so the driver might have some questions but i could fit the 2L bottle in my bag safely

was thinking of ordering 2 bottles of the 2L nitrogen bottles and only setting off the second tank once i put the eb over my head, but im concerned that will produce a surplus of gas and that the bag could potentially explode

basically, what would you do in my situation? how risky is it to deviate from the recommended 40 mins of gas flow?
maybe i should clarify that the 2L tank is at 200 bar so it would be 420l at atmospheric pressure, and the 9L tank is 137 bar and would produce 1233 litres of gas at atmospheric pressure
 
ipmanwc0

ipmanwc0

Doctor Sleep
Sep 15, 2023
727
I would dm you a source but your account is too new
 
O

outrider567

Illuminated
Apr 5, 2022
3,048
hello, after an attempt to CTB last month my family is on high alert, meaning im not able to act, when i move out late next month, ill be proceeding with my plan, however ill be living in student accommodation, so i cant order N2 directly to my building as its a prohibited item, due to this, ill have to order it to a local pick up point

my problem is that the only nitrogen bottles ive seen on ebay are 2L (28 mins gas flow) or 9L (82 minutes) the 9L bottle i found comes with a regulator and tubing, but the only issue is that it weighs 15kg and is 82cm, so id have trouble transporting it, ive not got a car, so id have to get an uber from the pick up point, and carry it up some stairs to get to my room, would you recommend attempting to carry the 15kg bottle (im around 41kg) or just attempting to CTB with the 2L bottle? im not able to order gas directly from the supplier as i have no car and I doubt they would hand it over if i told them i was transporting it in an uber, also the 9L bottle is 82cm so the driver might have some questions but i could fit the 2L bottle in my bag safely

was thinking of ordering 2 bottles of the 2L nitrogen bottles and only setting off the second tank once i put the eb over my head, but im concerned that will produce a surplus of gas and that the bag could potentially explode

basically, what would you do in my situation? how risky is it to deviate from the recommended 40 mins of gas flow?
maybe i should clarify that the 2L tank is at 200 bar so it would be 420l at atmospheric pressure, and the 9L tank is 137 bar and would produce 1233 litres of gas at atmospheric pressure
Nitrogen doesn't explode
 
h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
I would dm you a source but your account is too new
yeah ive only just been able to get it unfortunately, i might be able to dm you and then you can respond with it?
Nitrogen doesn't explode
ik that but the bag can if there is too much gas inside of it and that would cause the attempt to fail
 
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Intoxicated

Intoxicated

Man
Nov 16, 2023
1,385
maybe i should clarify that the 2L tank is at 200 bar so it would be 420l at atmospheric pressure
LaTeX:
\[V_2 = V_1 \cdot \frac{P_1}{P_2} \cdot \frac{T_2}{T_1} \cdot \frac{Z_2}{Z_1}\]
where
V₁ is the initial volume,
V₂ is the end volume,
P₁ is the initial pressure,
P₂ is the end pressure,
T₁ is the initial temperature,
T₂ is the end temperature,
Z₁ is the compressibility factor at the initial pressure and temperature,
Z₂ is the compressibility factor at the end pressure and temperature.

If we roughly assume that T₁ = T₂ = 20 °C (approximately 293 K) and P₂ ≈ 1.01 bar, then we get

LaTeX:
\[V_2 \approx 2.0~L \cdot \frac{200~bar}{1.01~bar} \cdot 1 \cdot \frac{1.00}{1.05} \approx 380~L\]
 
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h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
but how risky would that be for CTB? in the 2025 pph it says "A 2-liter gas cylinder provides a suitable gas source." but people on here recommend to have enough gas for 40 minutes of flow
 
Intoxicated

Intoxicated

Man
Nov 16, 2023
1,385
but how risky would that be for CTB? in the 2025 pph it says "A 2-liter gas cylinder provides a suitable gas source." but people on here recommend to have enough gas for 40 minutes of flow
If you can execute the procedure perfectly, then that small amount may suffice. Otherwise, you could face with complications. Note that with such amount of gas it would be difficult to test your setup properly and preserve enough nitrogen for CTB at the same time.
 
h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
im just hoping to come by a 5L bottle, i was considering getting 2 of the 2L tanks and setting off the second one when i pull the EB over my head, im serious about CBT and need this next attempt to work, its a pity that the 8L tank im looking at is 15kg so its too heavy for me to transport.. that wouldve been perfect for testing the setup a bit beforehand
 
W

watergun88

Member
Aug 13, 2026
52
40 minutes of flow ? i still dont understand how much you need to ctb. what if someone put total of 140cf of n2 in a 100cf car ? will that be enough? (without mask)

and where you brought those small gas tank anyway ? 8L ?? 2 L?? u get it from the industial gas to get supplies or what?

and you are talking about 'liquoid 'nitrogen right ?
 
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D

DeathSweetDeath

Visionary
Nov 12, 2025
2,149
yeah ive only just been able to get it unfortunately, i might be able to dm you and then you can respond with it?

ik that but the bag can if there is too much gas inside of it and that would cause the attempt to fail
No bc the bag is not sealed, two finger rule allows last remaining carbon dioxide & excess gas to escape. I think you've moved on to a different method now anyway but just to clarify.
40 minutes of flow ? i still dont understand how much you need to ctb. what if someone put total of 140cf of n2 in a 100cf car ? will that be enough? (without mask)

and where you brought those small gas tank anyway ? 8L ?? 2 L?? u get it from the industial gas to get supplies or what?

and you are talking about 'liquoid 'nitrogen right ?
Not liquid nitrogen, nitrogen gas. Inert gas doesn't work that way in a small space. If you want to CTB in your car with no exit bag or mask, it would need to be filled with carbon monoxide or similar. It seems like you may not have read any of this yet (which is a mistake as it's absolutely essential for anyone who wants to CTB)…
 
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h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
No bc the bag is not sealed, two finger rule allows last remaining carbon dioxide & excess gas to escape. I think you've moved on to a different method now anyway but just to clarify.

Not liquid nitrogen, nitrogen gas. Inert gas doesn't work that way in a small space. If you want to CTB in your car with no exit bag or mask, it would need to be filled with carbon monoxide or similar. It seems like you may not have read any of this yet (which is a mistake as it's absolutely essential for anyone who wants to CTB)…
ahh right thank you thats helpful to know, nope, still sticking with my eb but going to be taking SN right before hyperventilating and pulling the eb over my head just so if anything does go wrong the sn will finish me off
 
D

devils~advocate

Specialist
Feb 29, 2024
366
There are manufactured hoods that one can get rather cheaply (less than $100 usd)
 
h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
There are manufactured hoods that one can get rather cheaply (less than $100 usd)
like an EEBD hood? ive not really researched alternatives to the eb but honestly idm using a bag for it so im most likely going to go ahead with that
 
W

watergun88

Member
Aug 13, 2026
52
Not liquid nitrogen, nitrogen gas. Inert gas doesn't work that way in a small space. If you want to CTB in your car with no exit bag or mask, it would need to be filled with carbon monoxide or similar. It seems like you may not have read any of this yet (which is a mistake as it's absolutely essential for anyone who wants to CTB)…
'Inert gas doesn't work that way in a small space what u mean by that? why i cant use N2 as carbon monoxide? (if i have enough why not ? )
'carbon monoxide' made me throw up... thats why i am switching to a sarco capsule like metho.
and yes, now i have read the exit bag link now but they didnt talk about 'sarco capsule'
 
D

DeathSweetDeath

Visionary
Nov 12, 2025
2,149
'Inert gas doesn't work that way in a small space what u mean by that? why i cant use N2 as carbon monoxide? (if i have enough why not ? )
'carbon monoxide' made me throw up... thats why i am switching to a sarco capsule like metho.
and yes, now i have read the exit bag link now but they didnt talk about 'sarco capsule'
But that's the piece of reality that you're rejecting here, it isn't talked about there for a reason.
 
W

watergun88

Member
Aug 13, 2026
52
But that's the piece of reality that you're rejecting here, it isn't talked about there for a reason.
i think i might know the reason... its becuase its way harder... than a bag...
but i have my own reason to not choose the bag, just like in the link that person tired 3 time... its too easy for the SI to kick in the take off the bag, and i cant stand the bag either.

i just want to make sure i didnt rejected reality, and being naive again...
i told u i have enough equiment. i think i need testing, thats what i need , but thank you anyway, i just want to make sure i am not making up stuff in my head again.
 
D

devils~advocate

Specialist
Feb 29, 2024
366
like an EEBD hood? ive not really researched alternatives to the eb but honestly idm using a bag for it so im most likely going to go ahead with that
yes there are hoods used with an air supply

1787077485926
(Edit: sorry these types of hoods require quite a bit of flow since they are heavy enough to seal around someones neck & shoulders. Probably more than 170 Lpm, which would require a large cylinder that might give 12-15 minutes of flow at the most)

Restraints can be used as well. Search bed restraints for dementia
 
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h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
i think i might know the reason... its becuase its way harder... than a bag...
but i have my own reason to not choose the bag, just like in the link that person tired 3 time... its too easy for the SI to kick in the take off the bag, and i cant stand the bag either.

i just want to make sure i didnt rejected reality, and being naive again...
i told u i have enough equiment. i think i need testing, thats what i need , but thank you anyway, i just want to make sure i am not making up stuff in my head again.
before i knew too much about the method i attempted with what was a pretty botched helium exit bag i had a date planned but couldnt take it anymore and impulsively went for it at a random time, SI didnt kick in for me personally, i only removed the bag because of a mechanical failure with one of my helium tanks, i was very anxious doing it dont get me wrong, but SI didnt cause my attempt to fail and i didnt have that much of an issue with it personally, i think it depends on the individual

SI is going to be an issue for any method you are fighting against years of evolution that has hardwired you to survive for thousands of years, at least with this method, if SI kicks in and you remove the bag youll come out pretty unharmed as you wont have lost consciousness, i had a few negative side effects after it such as a bit of short term memory loss and struggles with speaking (most likely was anxiety) which is pretty chill compared to other methods when you abort the attempt for whatever reason
yes there are hoods used with an air supply

View attachment 207436
ive not looked into these too much and it solves the problem of creating the eb esp since im not too crafty but the only cylinder ill be able to use is a 2L 200 bar one which gives ~26 mins of gas flow at 15L/PM but from what i remember in the pph these types of masks require a flow rate of 25 LP/M which would only give me 16 mins of gas flow which is way too risky for my liking its only something id consider if i could find a nitrogen cylinder thats not made of steel but instead aliminum or another lighter material bc the only reason im not able to get a higher gas volume cylinder is due to the heaviness of them and a physical inability to carry those
 
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D

devils~advocate

Specialist
Feb 29, 2024
366
ive not looked into these too much and it solves the problem of creating the eb esp since im not too crafty but the only cylinder ill be able to use is a 2L 200 bar one which gives ~26 mins of gas flow at 15L/PM but from what i remember in the pph these types of masks require a flow rate of 25 LP/M which would only give me 16 mins of gas flow which is way too risky for my liking its only something id consider if i could find a nitrogen cylinder thats not made of steel but instead aliminum or another lighter material bc the only reason im not able to get a higher gas volume cylinder is due to the heaviness of them and a physical inability to carry those
Yes, sorry I didnt realize these particular hoods require a lot of flow to make them operate correctly (170 lpm). They are made for a constant flow supply like a compressor.

Emergency hoods (eebd) could work better. They are designed for a portable air supply.
I think they use something around 40 lpm.
With a large cylinder (80cf = 2200L) they could last around 50 minutes

1787078792201
 
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Fadenself00_

Fadenself00_

🍎🍎🍎
Sep 21, 2025
517
'Inert gas doesn't work that way in a small space what u mean by that? why i cant use N2 as carbon monoxide? (if i have enough why not ? )
'carbon monoxide' made me throw up... thats why i am switching to a sarco capsule like metho.
and yes, now i have read the exit bag link now but they didnt talk about 'sarco capsule'
Death with nitrogen hypoxia occurs from inhaling a pure inert gas (the nitrogen), preventing any oxygen from entering your lungs, leading to death by hypoxic hypoxia, not poisoning and subsequent effects in the body from the gas itself (CO)

CO in an enclosed space would therefore work, but a nitrogen death in a car would be much, much more difficult, as air (containing oxygen), would both need to escape/be displaced *entirely*, while at the same time not re-entering. (Essentially a really really big exit bag if executed perfectly, but TL;DR, it would be impractical and unreliable)
 
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NitrogenNightmare

NitrogenNightmare

Member
May 30, 2026
28
First of all, I love your username 🖤 That's fucking awesome.

There's a few ideas here. One, when my friend got her nitrogen tank filled, she did just go to a local welding store and took the gas home in an uber. She called the driver before pickup to make sure they were ok transporting compressed gas, and they didn't seem to give a shit. She just held the cylinder between her legs.

That's not to guarantee the supplier will be cool with this method of transport, but you don't have to be honest about how you're getting it home.

What kind of packaging does the larger cylinder come in? Could you get someone to help you carry it and just not tell them what it is?

And IDK if this is what you're trying to say with the 2x2L tanks, but could you just get an extra regulator and hose, tape both into the bag, and run them simultaneously at half the flow rate?
 
W

watergun88

Member
Aug 13, 2026
52
what is TL and DR?
btw my set up is 3 tank of N2 total is 180 cf of N2 in a 130 cf car spaec + 10L of liquid nitrogen tank without lid after the tank is empty (it give continues N2 supply ) which 'i believe' will create a possitive air pressure to push out or keep out the air from coming in .
 
D

devils~advocate

Specialist
Feb 29, 2024
366
Yes, having 2x cylinders each set at 1/2 the flow rate needed, supplying to a single output, would equal 2x the flow.
It would also give 2x the time. The flow just has to be 1/2 for all this to work.
 
Fadenself00_

Fadenself00_

🍎🍎🍎
Sep 21, 2025
517
what is TL and DR?
btw my set up is 3 tank of N2 total is 180 cf of N2 in a 130 cf car spaec + 10L of liquid nitrogen tank without lid after the tank is empty (it give continues N2 supply ) which 'i believe' will create a possitive air pressure to push out or keep out the air from coming in .
TL;DR means "Too long; Didn't Read" it's used to indicate that what follows is a short summary of the text.

Two things I see being an issue here:

1. If one doesn't make sure to open up a window slightly, there might be an explosive release of pressure and something giving in, so probably wise to open up a window slightly,
2. As I described before, in such a big space that is not designed for it, you may have pockets of air that won't escape. (I guess if the main outlet was at the bottom of the space [car] one would be more true to simulating a giant exit bag and take advantage of nitrogen being less dense than air and pushing the air out to the bottom) *but regardless(!)*:

This is a sort of "complex suicide" aka. a non-established/hacky method. Methods like that are generally considered non-methods, especially if there are proven alternatives.

Be very mindful of choosing how to proceed, please
 
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D

devils~advocate

Specialist
Feb 29, 2024
366
Using a car interior for this purpose will require a lot of gas (>100cf). A automobile envelope is not designed to be air tight.
There are openings in the ventilation system, built in pressure relief valves, drain holes and various other places.
Then if it were to be sealed completely (which is doubtful) the CO2 would need to be displaced and ejected somehow.
Items like an EEBD hood, exit bag, etc take this into account along with the smaller volume for efficient use of gas.
 
W

watergun88

Member
Aug 13, 2026
52
TL;DR means "Too long; Didn't Read" it's used to indicate that what follows is a short summary of the text.

Two things I see being an issue here:

1. If one doesn't make sure to open up a window slightly, there might be an explosive release of pressure and something giving in, so probably wise to open up a window slightly,
2. As I described before, in such a big space that is not designed for it, you may have pockets of air that won't escape. (I guess if the main outlet was at the bottom of the space [car] one would be more true to simulating a giant exit bag and take advantage of nitrogen being less dense than air and pushing the air out to the bottom) *but regardless(!)*:

This is a sort of "complex suicide" aka. a non-established/hacky method. Methods like that are generally considered non-methods, especially if there are proven alternatives.

Be very mindful of choosing how to proceed, please
ty so much man , but the bag thing is the problem for me ... idk why, thats why i am trying to use a car which i believe will made me more mentally confortable and i will accept it on my subconscious. my biggest thing i have to deal with right now is my subconscious. i have to make peace with him and make him let me do my thing
 
Fadenself00_

Fadenself00_

🍎🍎🍎
Sep 21, 2025
517
Using a car interior for this purpose will require a lot of gas (>100cf). A automobile envelope is not designed to be air tight.
There are openings in the ventilation system, built in pressure relief valves, drain holes and various other places.
Then if it were to be sealed completely (which is doubtful) the CO2 would need to be displaced and ejected somehow.
Items like an EEBD hood, exit bag, etc take this into account along with the smaller volume for efficient use of gas.
The main issue is oxygen not being fully displaced.. CO2 is not an issue in such a big space, if it were fully rid of oxygen. Otherwise you would feel like suffocating while sitting in the car normally
 
h4ppyhypoxia

h4ppyhypoxia

Student
Aug 8, 2026
143
First of all, I love your username 🖤 That's fucking awesome.

There's a few ideas here. One, when my friend got her nitrogen tank filled, she did just go to a local welding store and took the gas home in an uber. She called the driver before pickup to make sure they were ok transporting compressed gas, and they didn't seem to give a shit. She just held the cylinder between her legs.

That's not to guarantee the supplier will be cool with this method of transport, but you don't have to be honest about how you're getting it home.

What kind of packaging does the larger cylinder come in? Could you get someone to help you carry it and just not tell them what it is?

And IDK if this is what you're trying to say with the 2x2L tanks, but could you just get an extra regulator and hose, tape both into the bag, and run them simultaneously at half the flow rate?
thank you i love yours as well, honestly i was thinking of using 2 tanks, one to "fill the bag" before i put it over my face, which should take ~2 minutes and then right before i pull it down over my face id turn on the second tank and turn off the first one just to give me a little boost

as for having someone carry it that is potentially possible but its quite a big package so id probably need an excuse for what it could be and id feel really bad bc ik whoever i get to carry it is going to feel really guilty when i ctb and if they think they helped me carry the means to do so
Yes, having 2x cylinders each set at 1/2 the flow rate needed, supplying to a single output, would equal 2x the flow.
It would also give 2x the time. The flow just has to be 1/2 for all this to work.
oh wow actually ill do this ill have to look in to how to do that properly i was going to say this is life saving advice but im not sure thats the appropriate term but i could defo do that when i figure out how lolol
 
Fadenself00_

Fadenself00_

🍎🍎🍎
Sep 21, 2025
517
ty so much man , but the bag thing is the problem for me ... idk why, thats why i am trying to use a car which i believe will made me more mentally confortable and i will accept it on my subconscious. my biggest thing i have to deal with right now is my subconscious. i have to make peace with him and make him let me do my thing
Are you truly sure there isn't any other way besides ctb? It would be a very big risk to attempt like this (and attempting in general)
 

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