Hydrogen Sulphide - Need more advice

[SomeRandomThing]

Hi everyone, this is my first post here, so hopefully I won't be doing anything wrong with this post.

I'm not looking to make any life-ending decisions yet, however I seem to feel a huge sense of relief when I have a reliable method in place as a last resort, should I ever choose to go down that route.

I've been looking for a while at different options now, and there are so many things online relating to risks, pain, failed attempts, etc. I just want a reasonably easy, reliable and mostly pain free, mostly stress free way to die, if I ever feel like it's the way to go.

I'm from UK, England, and sourcing most things here is very difficult, everything relating to suicide risk seems to be under tight control and very limited availability.

The Peaceful Pill ehandbook has been a rather wonderful resource, with a lot of detail and information, which is amazing to see. I think I've opted for Hydrogen Sulphide as my method of choice. The handbook seems to suggest that it's easy to produce, painless, and that you will pretty much just fall asleep once the gasses are produced. But after seeing a few posts here, it also seems that some people are suggesting that it will be a painful way to go, so I'm not sure what to believe here.

I was thinking that if I do this, it would be somewhere secluded, in my car.

As per the instructions, I'd mix 500ml calcium sulphide (Lime sulphur), with 500ml of sulphuric acid. I'm expecting a pretty nasty smell from it, but smells don't bother me, so I don't think this would bother me at all.

So my questions really with regards to the above are the following:

- What factors should I consider to ensure that it's mostly painless, and that I'll just fall into an unconcious state?
- In the UK, sourcing these items are difficult. For the lime sulphur, I've found this, but I'm not sure if it needs to be concentrated, or if this is suitable? (https://hyperdrug.co.uk/easivet-lime-sulphur-dip-500ml/)
- Similar to the above, sourcing concentrated sulphuric acid is difficult now as access is more controlled. I can probably get ahold of 36% sulphuric acid, would that be enough? (https://www.jennychem.com/products/36-hydrochloric-acid)
- With the above in mind, would it even be advisable to go above and beyond the 500ml of each suggested in the handbook, and perhaps mix 1 litre of each product?

I hope these questions are all acceptable. My ADHD brain is really struggling with some of the complexities and formulas that I've seen, and I'm not so good with understanding the chemistry behind this stuff, so please, any general advice and guidance is much appreciated, especially if you can explain it in super simple terms.

One final thing that I thought of... I do have a gas mask with an air tube attachment. If I mixed the liquids in the bucket, and sealed the bucket in such a way that my air tube was placed into the bucket, above the liquid, then would this result in a more reliable outcome?

Thank you all in advance, hope you all have a good day.

 

[gothbird]

First off, welcome. Your post is totally fine and thoughtful, and it's clear you're taking the time to research things carefully, which already puts you ahead of a lot of the chaos that floats around online. That clarity matters.

So, let's talk hydrogen sulphide. You're not wrong the PPH presents it as quick and effective, and it can be. But here's the caveat is its extremely unpredictable, highly dangerous to produce, and not even remotely as painless or clean cut as it's sometimes made out to be. And yeah, the smell is horrendous! We're talking eye watering, gag reflex, "rotten corpse in the sun" levels. You might say smell doesn't bother you, but H₂S isn't just a bad odour, it's a neurotoxic punch to the lungs. Your body will fight it, and that's where pain and panic can kick in.

• At low concentrations, H₂S causes nausea, vomiting, dizziness, difficulty breathing, and sometimes a burning sensation in the airways.
• At high concentrations, it can knock you unconscious within seconds—but getting to those concentrations safely, quickly, and without alerting others or harming yourself prematurely is extremely tricky.
• Many failed attempts report horrific side effects...think collapsing, gasping, vomiting, and waking up in a hospital with neurological issues or lung damage.

So in terms of "peaceful and mostly painless"? It's not ideal. Definitely not compared to something like SN, which is much more chemically stable and well documented in terms of protocol.

As for your specific questions:

• The lime sulphur product you linked might work, but you'd need to confirm the concentration and active ingredients. Most animal grade dips are heavily diluted, and you need calcium polysulfide at high strength.
• 36% sulphuric acid is likely too weak to generate the required gas volume fast enough, especially if the lime sulphur is also low concentration. Most effective reactions rely on 90–98% H₂SO₄, which is very hard to legally obtain now in the UK.
• Doubling the volume doesn't guarantee success—it might just increase the smell and danger, not the reliability.
• Using a gas mask with a tube sounds clever, but it adds complexity and risk. H₂S doesn't play around—it seeps fast, displaces oxygen, and can easily overcome you before the setup does what you intended.

And yeah, maybe a proper SN sticky is overdue. I'd be happy to help write one.

Glad you're here, even just for now.

 

[SomeRandomThing]

First off, welcome. Your post is totally fine and thoughtful, and it's clear you're taking the time to research things carefully, which already puts you ahead of a lot of the chaos that floats around online. That clarity matters.

So, let's talk hydrogen sulphide. You're not wrong the PPH presents it as quick and effective, and it can be. But here's the caveat is its extremely unpredictable, highly dangerous to produce, and not even remotely as painless or clean cut as it's sometimes made out to be. And yeah, the smell is horrendous! We're talking eye watering, gag reflex, "rotten corpse in the sun" levels. You might say smell doesn't bother you, but H₂S isn't just a bad odour, it's a neurotoxic punch to the lungs. Your body will fight it, and that's where pain and panic can kick in.

• At low concentrations, H₂S causes nausea, vomiting, dizziness, difficulty breathing, and sometimes a burning sensation in the airways.
• At high concentrations, it can knock you unconscious within seconds—but getting to those concentrations safely, quickly, and without alerting others or harming yourself prematurely is extremely tricky.
• Many failed attempts report horrific side effects...think collapsing, gasping, vomiting, and waking up in a hospital with neurological issues or lung damage.

So in terms of "peaceful and mostly painless"? It's not ideal. Definitely not compared to something like SN, which is much more chemically stable and well documented in terms of protocol.

As for your specific questions:

• The lime sulphur product you linked might work, but you'd need to confirm the concentration and active ingredients. Most animal grade dips are heavily diluted, and you need calcium polysulfide at high strength.
• 36% sulphuric acid is likely too weak to generate the required gas volume fast enough, especially if the lime sulphur is also low concentration. Most effective reactions rely on 90–98% H₂SO₄, which is very hard to legally obtain now in the UK.
• Doubling the volume doesn't guarantee success—it might just increase the smell and danger, not the reliability.
• Using a gas mask with a tube sounds clever, but it adds complexity and risk. H₂S doesn't play around—it seeps fast, displaces oxygen, and can easily overcome you before the setup does what you intended.

And yeah, maybe a proper SN sticky is overdue. I'd be happy to help write one.

Glad you're here, even just for now.

I really appreciate the detailed and informative response. That's helpful to understand. I'll probably continue to research other methods too then. Being able to drift off and fall asleep is certainly the way I'd like to achieve this, if possible.

 

[Intoxicated]

But after seeing a few posts here, it also seems that some people are suggesting that it will be a painful way to go, so I'm not sure what to believe here.

If it's done in a proper way, the worst perceivable symptom you can get is irritation of the throat and respiratory tract.

The effects of H2S on humans are well described in these two documents

https://i.sanctioned-suicide.net/images/2024/12/216368_CDC_NIOSH_-_H2S.pdf

https://i.sanctioned-suicide.net/images/2024/12/216369_EPA_-_H2S.pdf

I was thinking that if I do this, it would be somewhere secluded, in my car.

As per the instructions, I'd mix 500ml calcium sulphide (Lime sulphur), with 500ml of sulphuric acid.

The editions of PPH/PPEH which I have advice concentrated hydrochloric acid. It's definitely not a perfect reagent, because concentrated solutions of HCl are highly volatile fuming fluids that emit irritating hydrogen chloride. Dilute sulfuric acid is better in this regard, since it's not volatile, but there may be some nuances with it too.

I'm expecting a pretty nasty smell from it

It may be not as nasty as people tend to picture it. I've smelled H2S, and for me its odor resembles that of chicken eggs which were boiled for 15 - 20 minutes and then shredded. Not even close to rotten eggs, which smell 100 times worse (thiols contained in rotten eggs are far more stinky than H2S).

In literature, the odor of H2S at relatively high concentrations (above 30 ppm per https://www.osha.gov/hydrogen-sulfide/hazards) is described as sweet or sickeningly sweet, and the sense of smell is quickly abolished above 100 - 300 ppm. The offensive odor of H2S should be the least problem if you deal with it far from other people (that is also good for their safety).

What factors should I consider to ensure that it's mostly painless, and that I'll just fall into an unconcious state?

I'd try to reduce the time to LOC instead of attempting to reduce the intensity of irritation to bare minimum. At 5000 ppm or above, loss of consciousness should occur in a few seconds.

In order to reduce irritation, I'd use an acidless method of making H2S, such as Al2S3 + H2O. Aluminium powder and sulfur powder needed for preparation of aluminium sulfide should be available in the UK.

Alternatively, 10% HCl or 20% H2SO4 could be used.

Whenever the eyes could be exposed to high concentrations of H2S, they should be closed or protected with airtight googles. Breathing with H2S should be done through the mouth, since the nasal airways are commonly more sensitive to irritation than the throat.

In the UK, sourcing these items are difficult. For the lime sulphur, I've found this, but I'm not sure if it needs to be concentrated, or if this is suitable?

Lime sulfur doesn't look like a good reagent for me, because it typically contains polysulfides which produce sulfur upon reaction with acids, possibly leading to formation of foam that can escape the vessel. This issue is especially severe when concentrated HCl is used to speed up the reaction as shown on the video below



This video demonstrates how the reaction should not be carried out - you probably wouldn't want to smell the acidic fumes from such massive spills.

Similar to the above, sourcing concentrated sulphuric acid is difficult now as access is more controlled.

Using concentrated H2SO4 for making H2S would be a big mistake, because the concentrated acid would oxidize the sulfur ions to sulfur and sulfur dioxide which you don't need. SO2 is not only a useless product, it's a strong irritant.

I can probably get ahold of 36% sulphuric acid, would that be enough?

I guess, even 36% could be a bit too high (unless the other reagent is dissolved in water), I'd advise to dilute it to 20% in order to reduce formation of SO2 to bare minimum.

Besides, I suspect that mixing H2SO4 with lime sulfur may lead to a somewhat troublesome reaction due to possible formation of foam consisting of badly soluble CaSO4. It would be better to use something like Na2S or FeS instead of lime sulfur.

With the above in mind, would it even be advisable to go above and beyond the 500ml of each suggested in the handbook, and perhaps mix 1 litre of each product?

If you collect produced H2S in a plastic bag instead of wasting big amounts of the gas on filling the entire car, you'd need much less reagents for reliable CTB. For example, 30 g of aluminium powder, 50 g of sulfur powder, and 200 ml of water should suffice for making a lethal amount of H2S.

The bag with collected H2S is supposed to be placed inside another bag, which is then placed over the head and sealed around the neck while holding breath. Having such a setup, you'd likely deal with H2S at concentrations as high as 5'000 - 200'000 ppm (assuming the amount of collected H2S to be nearly 0.5 - 2 liters and the space inside the outer bag to be 10 - 100 liters) that should render unconsciousness in approximately 5 - 10 seconds since inhalation has started. In order to reduce possible irritation by overly concentrated H2S, the outer bag of a large volume (like 40 - 100 liters) almost fully inflated with air should probably be preferred.

One final thing that I thought of... I do have a gas mask with an air tube attachment. If I mixed the liquids in the bucket, and sealed the bucket in such a way that my air tube was placed into the bucket, above the liquid, then would this result in a more reliable outcome?

I guess, breathing very concentrated H2S may be not a good idea, because the irritating effect could cause a severe discomfort. Anyway your suffering wouldn't be too long. The narrator in the following video said that people lose consciousness in 5 - 60 seconds from only 700 ppm, and I can bet that you wouldn't need to wait for 60 seconds when inhaling H2S at 5000 ppm or above

View attachment H2S.mp4