Last one I swear. Hydrogen sulfide

[jane78flower]

I'm sorry I am just trying to figure it out. Any experts/chemists. on the Hydrogen Sulfide method pls help me. If there is any question you can answer pls feel free.

1. What are products I can use in USA? How much of each one is way over safe?
2. How far away can you smell this? I think I have a safe spot but need to be sure.
3. How long will it take for them to react? I am under the impression I pour them outside of the tent then place them inside & then how long should I wait before I go in?
4. How long should it take to work? How long do I have safe to not be found & revived?
5. Anything else I need to be aware of/any tips.

I know I'll need a bucket, eyewear, gloves, something to cover my nose and mouth til the concentration builds, the 2 items to mix, an enclosed space, duct tape to seal the tent…
Also what are the risks of this method. I know hurting others is a big thing to be cautious abt

 

[Intoxicated]

2. How far away can you smell this? I think I have a safe spot but need to be sure.

H2S is a very smelly gas, so if you produce it in large amounts, its odor may be perceived from a large distance like 50 - 100 meters or even more (I know, many US people hate the metric system, but for me it's easier to understand than measurements in feet). I can tell this based on my experience of smelling H2S that came from open wells.

The characteristic "rotten egg" odour of hydrogen sulfide is well known. The threshold of perception of this odour varies considerably depending on individual sensitivity, but, under laboratory conditions, it ranges from 0.0008 to 0.20 mg/m3 (0.0005-0.13 ppm).

Source: https://iris.who.int/bitstream/handle/10665/37261/9241540796-eng.pdf (page 7)

0.0005 ppm is just 0.5 parts per billion. If you produce 10 liters of H2S and dissipate it evenly in a volume of 100 m x 100 m x 100 m (10⁶ m³ or 10⁹ liters), you'll get 10 parts per billion that may be enough for perceiving by some people.

3. How long will it take for them to react? I am under the impression I pour them outside of the tent then place them inside & then how long should I wait before I go in?

I guess, that depends on the initial temperature of the reactants. If they're cold, the reaction may go slowly (at least initially). If their temperature is 20 °C or above, 5 - 10 minutes should suffice for making effective concentration, assuming that the reagents were taken in right quantities.

4. How long should it take to work? How long do I have safe to not be found & revived?

Usually acute intoxication occurs from a single, massive exposure to 2,000 ppm (2,781 mg/m³) or more, and unconsciousness occurs within a few seconds, without significant warning or pain. Unconsciousness, termed "knock-down" by workers, is almost immediately followed by respiratory paralysis, and after that by a short period of tonic convulsions (Yant, 1930). The heart continues to beat for several minutes. Death occurs unless the victim is removed from the contaminated area and artificial ventilation is immediately initiated.

Source: https://i.sanctioned-suicide.net/images/2024/11/213513_EPA_-_H2S.pdf (page 8-24)

This old video (at timestamp 4:38) suggests that after 10 minutes since cessation of breathing the chance for recovery becomes very low

View attachment H2S.mp4

 

[wham311]

I'm sorry I am just trying to figure it out. Any experts/chemists. on the Hydrogen Sulfide method pls help me. If there is any question you can answer pls feel free.

1. What are products I can use in USA? How much of each one is way over safe?
2. How far away can you smell this? I think I have a safe spot but need to be sure.
3. How long will it take for them to react? I am under the impression I pour them outside of the tent then place them inside & then how long should I wait before I go in?
4. How long should it take to work? How long do I have safe to not be found & revived?
5. Anything else I need to be aware of/any tips.

I know I'll need a bucket, eyewear, gloves, something to cover my nose and mouth til the concentration builds, the 2 items to mix, an enclosed space, duct tape to seal the tent…
Also what are the risks of this method. I know hurting others is a big thing to be cautious abt

I could be wrong but I do not think the items are readily available for sale anymore and it requires cooking other products down and is sort of a process.

There are YouTube videos on how to create it

 

[EmptyBottle]

This old video (at timestamp 4:38) suggests that after 10 minutes since cessation of breathing the chance for recovery becomes very low

View attachment 170379

Interesting video and rat demo, glad they successfully brought the rat back to life.
Somehow on firefox I had to download the video and open it with ffplay (the simplest video player I know)

 

[jane78flower]

H2S is a very smelly gas, so if you produce it in large amounts, its odor may be perceived from a large distance like 50 - 100 meters or even more (I know, many US people hate the metric system, but for me it's easier to understand than measurements in feet). I can tell this based on my experience of smelling H2S that came from open wells.

The characteristic "rotten egg" odour of hydrogen sulfide is well known. The threshold of perception of this odour varies considerably depending on individual sensitivity, but, under laboratory conditions, it ranges from 0.0008 to 0.20 mg/m3 (0.0005-0.13 ppm).

Source: https://iris.who.int/bitstream/handle/10665/37261/9241540796-eng.pdf (page 7)

0.0005 ppm is just 0.5 parts per billion. If you produce 10 liters of H2S and dissipate it evenly in a volume of 100 m x 100 m x 100 m (10⁶ m³ or 10⁹ liters), you'll get 10 parts per billion that may be enough for perceiving by some people.

I guess, that depends on the initial temperature of the reactants. If they're cold, the reaction may go slowly (at least initially). If their temperature is 20 °C or above, 5 - 10 minutes should suffice for making effective concentration, assuming that the reagents were taken in right quantities.

Usually acute intoxication occurs from a single, massive exposure to 2,000 ppm (2,781 mg/m³) or more, and unconsciousness occurs within a few seconds, without significant warning or pain. Unconsciousness, termed "knock-down" by workers, is almost immediately followed by respiratory paralysis, and after that by a short period of tonic convulsions (Yant, 1930). The heart continues to beat for several minutes. Death occurs unless the victim is removed from the contaminated area and artificial ventilation is immediately initiated.

Source: https://i.sanctioned-suicide.net/images/2024/11/213513_EPA_-_H2S.pdf (page 8-24)

This old video (at timestamp 4:38) suggests that after 10 minutes since cessation of breathing the chance for recovery becomes very low

View attachment 170379

Thank you so much you are so knowledgable.

Do you happen to have info on using co2 from soda canisters? How much would I need in a small tent, is this feasible? Thanks in advance if you wanna answer, I trust you. I fear that the H2S method may be detectable

Thank you so much you are so knowledgable.

Do you happen to have info on using co2 from soda canisters? How much would I need in a small tent, is this feasible? Thanks in advance if you wanna answer, I trust you. I fear that the H2S method may be detectable

& like would I experience bad symptoms if concentration is high enough? How long would it take to pass? Could I wake up again? Tysm

 

[Intoxicated]

Do you happen to have info on using co2 from soda canisters? How much would I need in a small tent, is this feasible?

CO2 requires a much higher concentration than H2S to produce unconsciousness quickly - something like 17 - 30% against 0.1 - 0.2%. If 1 kg of baking soda fully reacts with some acid, this will produce approximately 0.27 cubic meters of CO2. This would be enough to make a concentration of 27% in 1 cubic meter of space, assuming that the gas doesn't escape at all. In reality, you won't rely on 100% yield (waiting for completion of the reaction would take eternity) and some part of CO2 will escape the tent, so you'd probably need 2 or more kilograms of baking soda per 1 cubic meter of space to produce a satisfactory concentration in a reasonable time. Additionally, since the reaction is notably endothermic, you might need some source of heat to speed it up, because otherwise its rate may become too slow due to cooling.

I think that for the purposes of filling a tent, a CO2 cylinder or a few kg of dry ice would be way more suitable than chemical reactions involving baking soda.

It's always easier to make a high concentration of some gas inside a relatively small plastic bag than inside a relatively big confined space like a tent, so I personally wouldn't use a tent without a strong justification. This applies to H2S poisoning as well.

I fear that the H2S method may be detectable

If the concern is related to a possible interruption, then finding a place that is far from other people should solve the issue (this is good for their safety too). If the goal is to make the death looking like an accident rather than a suicide, then H2S poisoning doesn't seem to be a good candidate for this purpose. Fatal CO2 poisoning from dry ice in a tent with no signs of careful sealing might look like accidental.

& like would I experience bad symptoms if concentration is high enough? How long would it take to pass?

In case of H2S, if you protect your eyes with goggles or close them and breathe through the mouth, the irritating effect of H2S should be quite bearable. In case if concentrated hydrochloric acid is used, it may intensively release irritating hydrogen chloride. This fuming can be reduced by diluting the acid to 10 - 15%.

The narrator on the video above said that breathing H2S at 700 ppm produces unconsciousness in 5 - 60 seconds, and this document mentions that "Inhalation of only 1 or 2 breaths of air containing 5,000 ppm (7000 mg/m³) H2S causes unconsciousness", so this data should give you some idea of how fast loss of consciousness can be expected.

In case of CO2, I'd expect a feeling of strong suffocation for a few seconds, likely with a burning sensation similar to the one from drinking carbonated/sparkling water. Maybe some day I will be reckless enough to test it myself and then tell how it felt if I survive in the end. At concentration of 30%, loss of consciousness should occur in 20 - 30 seconds. At least, this is what was recorded for carbogen consisting of 30% CO2 + 70% O2 (https://i.sanctioned-suicide.net/images/2025/03/224148_NIOSH_-_CO2.pdf - pages 25, 37).

Could I wake up again?

I have no any data about such cases, and I hardly imagine how that could be possible theoretically.

 

[pthnrdnojvsc]

@Intoxicated if testing in a 100 liter bin.

how many Liters of h2S in that bin would 1 ML of lime sulfur and 1 ML 32% HCL produce?

I found this they tested .1 ml in a small flask to produce h2s . does that seem accurate. how much would you need for 1000 ppm in a 300 cubic feet?

https://www.researchgate.net/publication/5334050_Suicidal_poisoning_due_to_hydrogen_sulfide_produced_by_mixing_a_liquid_bath_essence_containing_sulfur_and_a_toilet_bowl_cleaner_containing_hydrochloric_acid

 

[Intoxicated]

how many Liters of h2S in that bin would 1 ML of lime sulfur and 1 ML 32% HCL produce?

It's difficult for me to assess approximate yield of H2S from lime sulfur, since lime sulfur doesn't look like a more or less certainly defined chemical compound. It's a mixture of various calcium polysulfides and useless byproducts like CaS2O3, CaSO3, etc present in unspecified proportions. Additionally, the mixture is commonly diluted with water at a variable ratio, that doesn't add clarity regarding how many Ca-S groups are contained in 1 ml of abstract lime sulfur. I guess, it would be easier to determine the possible yield for some sample experimentally than evaluate it theoretically. In case if the manufacturer specifies the certain % of Ca polysulfides in their product, it's possible to make some rough estimations based on chemical equations.

 

[jane78flower]

CO2 requires a much higher concentration than H2S to produce unconsciousness quickly - something like 17 - 30% against 0.1 - 0.2%. If 1 kg of baking soda fully reacts with some acid, this will produce approximately 0.27 cubic meters of CO2. This would be enough to make a concentration of 27% in 1 cubic meter of space, assuming that the gas doesn't escape at all. In reality, you won't rely on 100% yield (waiting for completion of the reaction would take eternity) and some part of CO2 will escape the tent, so you'd probably need 2 or more kilograms of baking soda per 1 cubic meter of space to produce a satisfactory concentration in a reasonable time. Additionally, since the reaction is notably endothermic, you might need some source of heat to speed it up, because otherwise its rate may become too slow due to cooling.

I think that for the purposes of filling a tent, a CO2 cylinder or a few kg of dry ice would be way more suitable than chemical reactions involving baking soda.

It's always easier to make a high concentration of some gas inside a relatively small plastic bag than inside a relatively big confined space like a tent, so I personally wouldn't use a tent without a strong justification. This applies to H2S poisoning as well.

If the concern is related to a possible interruption, then finding a place that is far from other people should solve the issue (this is good for their safety too). If the goal is to make the death looking like an accident rather than a suicide, then H2S poisoning doesn't seem to be a good candidate for this purpose. Fatal CO2 poisoning from dry ice in a tent with no signs of careful sealing might look like accidental.

In case of H2S, if you protect your eyes with goggles or close them and breathe through the mouth, the irritating effect of H2S should be quite bearable. In case if concentrated hydrochloric acid is used, it may intensively release irritating hydrogen chloride. This fuming can be reduced by diluting the acid to 10 - 15%.

The narrator on the video above said that breathing H2S at 700 ppm produces unconsciousness in 5 - 60 seconds, and this document mentions that "Inhalation of only 1 or 2 breaths of air containing 5,000 ppm (7000 mg/m³) H2S causes unconsciousness", so this data should give you some idea of how fast loss of consciousness can be expected.

In case of CO2, I'd expect a feeling of strong suffocation for a few seconds, likely with a burning sensation similar to the one from drinking carbonated/sparkling water. Maybe some day I will be reckless enough to test it myself and then tell how it felt if I survive in the end. At concentration of 30%, loss of consciousness should occur in 20 - 30 seconds. At least, this is what was recorded for carbogen consisting of 30% CO2 + 70% O2 (https://i.sanctioned-suicide.net/images/2025/03/224148_NIOSH_-_CO2.pdf - pages 25, 37).

I have no any data about such cases, and I hardly imagine how that could be possible theoretically.

Thank u so much for all ur knowledge. Btw I meant like the stuff for soda like the stuff that carbonates it that u can get at target n such. not the baking soda & acid method but I am interested in that…

It's difficult for me to assess approximate yield of H2S from lime sulfur, since lime sulfur doesn't look like a more or less certainly defined chemical compound. It's a mixture of various calcium polysulfides and useless byproducts like CaS2O3, CaSO3, etc present in unspecified proportions. Additionally, the mixture is commonly diluted with water at a variable ratio, that doesn't add clarity regarding how many Ca-S groups are contained in 1 ml of abstract lime sulfur. I guess, it would be easier to determine the possible yield for some sample experimentally than evaluate it theoretically. In case if the manufacturer specifies the certain % of Ca polysulfides in their product, it's possible to make some rough estimations based on chemical equations.

Hi intoxicated I wanna try the baking soda & citric acid method tonight & wondering if u knew where I could find a guide. Don't wanna make you type me a long thing about it but I think ur so intelligent with chemistry type stuff. Meanwhile I am researching the forum & online about it. But if I want to try & do this with a plastic bag, & you have any info or tips on that, I would be greatly appreciative. Anyone else who sees this is welcome to comment too. Im not allowed to make another thread says Dante lol.