Help Hydrogen Sulfide route

[pthnrdnojvsc]

Are you planning a big suicide party for 100+ guests?

You seem to want to CTB in the most difficult way. If I planned to decompose 1 liter of formic acid for whatever reason, I'd mix the acids gradually for safety. I wouldn't do this for suicide though. Making 2 - 4 liters of CO should suffice for this purpose. Using citric acid + sulfuric acid seems the most appealing method for me because of the lowest risk of exposure to irritating fumes.

Spoiler: Preparation of CO

From citric acid

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From formic/methanoic acid

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From sodium formate/methanoate

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From oxalic acid

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1. well enough hcn for me In a car . how would I make sodium cyanide or potassium cyanide safely.

 

[Intoxicated]

1. well enough hcn for me In a car .

IDK what would mean "enough" in a car. From what I've read, effectively working concentrations of HCN are close to those for H₂S. ≥1000 ppm is a must, and ≥2000 ppm would be better. 500 - 600 ppm seem insufficient for quick fainting.

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Reaching sufficiently high concentrations in a large confined space may take minutes depending on how much reagents you mix and how much you heat them. Prolonged exposure to concentrations that are insufficient for quick LOC may produce unpleasant symptoms.

Two possible reactions for making HCN are mentioned here

CLXXI.?The hydrolysis of potassium ferricyanide and potassium cobalticyanide by sulphuric acid | 10.1039/CT9242501358_Science Hub

tesble.com

If you wanna experiment, good luck.

how would I make sodium cyanide or potassium cyanide safely.

Safely? No idea

 

[like_a_bird]

Good luck finding the products. I tried. They banned lime sulfur in the US except to agricultural producers (good luck getting around it). I wanted this method so bad but it's not attainable.

Try veterinary products. I was able to purchase a lime sulfur dip on Chewy

 

[ZornTheDreaded]

Try veterinary products. I was able to purchase a lime sulfur dip on Chewy

I'm getting the sodium sulfied, I just need someone else to CTB with at this point, especially since I now don't have access to a car

 

[like_a_bird]

I'm getting the sodium sulfied, I just need someone else to CTB with at this point, especially since I now don't have access to a car

Best of luck to you

 

[ZornTheDreaded]

Good luck finding the products. I tried. They banned lime sulfur in the US except to agricultural producers (good luck getting around it). I wanted this method so bad but it's not attainable.

well here it is, now just to get Sulfuric Acid which can be gotten from a lot of places easily

 

[looking4partner]

So my attempt at CTB with an exitbag and nitrogen was a complete bust, I've now stumbled upon the Hydrogen Sulfide method and it sounds pleasing enough if I'd be able to do it correct that it would only take 1 breath for me to instantly get knocked out and die, however the main issue is it's confusing AF and figuring out what you actually need to get in order to do it and then figuring out how to get it is even more of a struggle because it seems like most things you just can't buy in America. Curious if anyone has any knowledge and know how to solve these struggles, it may help even more people struggling to CTB, and of course gotta do this method far away from people and put up warning signs

It seems that almost all of the potential methods are much more complicated to obtain & carry out than first impressions would make them appear

 

[noah12]

That's heroic ) I guess, pure carbon dioxide would be way less unpleasant to inhale than the fumes of concentrated formic acid.

As for making H₂S, here are some reactions that can be carried out with common purchasable reagents

Na₂S + 2 H⁺ → H₂S↑ + 2 Na⁺
FeS + 2 H⁺ → H₂S↑ + Fe²⁺
ZnS + 2 H⁺ → H₂S↑ + Zn²⁺
CuS + 2 H⁺ → H₂S↑ + Cu²⁺
BaS + 2 H⁺ → H₂S↑ + Ba²⁺
WS₂ + 2 H₂O + H⁺ → 2 H₂S↑ + WO₂ + H⁺
2 Al + 3 S → Al₂S₃; Al₂S₃ + 6 H₂O → 3 H₂S↑ + 2 Al(OH)₃
Mg + S → MgS; MgS + 2 H₂O → H₂S↑ + Mg(OH)₂

Dilute HCl and H₂SO₄ can be used as proton (H⁺) donors, but reactions that produce water-insoluble salts (such as BaSO₄) should be avoided.

Hi, can I ask you something?

I don't know how much of each I should use.

I can get Na2s 60%min solid form 1kg + HCl 12% liquid 5Litre

But do you think is enough to make H2S lethal and to lose consciousness quickly inside my car?

 

[Intoxicated]

I don't know how much of each I should use.

I can get Na2s 60%min solid form 1kg + HCl 12% liquid 5Litre

But do you think is enough to make H2S lethal and to lose consciousness quickly inside my car?

Concentrations 1.4 - 2.8 g/m³ are enough for losing consciousness in a few seconds. The volume of a car is usually in the range 2.4 - 4.5 m³. So 12.6 g (0.37 mol) of H₂S dissipated in a car should almost certainly suffice for rapid LOC.

0.37 mol of H₂S needs 0.37 mol (28.9 g) of Na₂S and 2 * 0.37 mol (27.0 g) of HCl completely reacted with each other. 12% hydrochloric acid contains 126.9 g of HCl per liter, so 27 g of HCl corresponds to 0.213 L (213 ml) of such a solution.

It's difficult to tell how much H₂S exactly is produced after mixing X amount of Na₂S and Y amount of HCl and waiting for T amount of time. It's likely that at least 10% yield (from the theoretical maximum) would be produced within a minute. Therefore, I'd expect that 0.5 kg of ≥60% sodium sulfide and 2 L of hydrochloric acid should suffice for reasonably fast production of rapidly acting concentration of H₂S anyway.

 

[atre]

IDK what would mean "enough" in a car. From what I've read, effectively working concentrations of HCN are close to those for H₂S. ≥1000 ppm is a must, and ≥2000 ppm would be better. 500 - 600 ppm seem insufficient for quick fainting.

[Hidden content]

Reaching sufficiently high concentrations in a large confined space may take minutes depending on how much reagents you mix and how much you heat them. Prolonged exposure to concentrations that are insufficient for quick LOC may produce unpleasant symptoms.

Two possible reactions for making HCN are mentioned here

CLXXI.?The hydrolysis of potassium ferricyanide and potassium cobalticyanide by sulphuric acid | 10.1039/CT9242501358_Science Hub

tesble.com

If you wanna experiment, good luck.

Safely? No idea

I've been trying to learn how to calculate ppm, to do mol and gram conversions and to do stoichiometry myself. And I'm buffled with the results, now I get why you always have said bags are better. You were (and are) absolutely right. The numbers I come up with sounds so practical and easy that I firstly got suspicious

A base solution made with 10 grams of pure Na2S (or 16.67 grams of 60% industrial flake form) mixed with 90mL of water should only take up 93-95 mL. This solution has 0.128 mol of na2s, which means it'll release 0.128 mol of H2S , A WHOPPING 3 liters of H2S gas at room temperature. 3 liters of H2S in a 50L capacity bag is:
- (3/50) x 1000000 = 60.000 SIXTY THOUSAND ppm. Let alone being "enough", that sounds overkill on paper, which is what one wants...

To react all the 0.128 mol of na2s one would need 0.0853 mol of citric acid. So 16grams of citric acid + 38mililiters of water makes a solution of 30% W/W acid, taking up only 45 to 50mL! At the worst case with only 150mL of reactants in total can get you approximately 3 liters of H2S assuming my math is correct.

I just couldn't believe how little it actually takes if you use a bag over your head instead of gassing a whole tent-car. Even with the worst circumstances, such as 50% of the H2S seeping out the bag while you fix the bag on your neck, the remaining 1-1.5 liters of H2S in the bag makes up 20.000PPM.

I don't know anyone else in the forum to show my calculations, and am overjoyed at the moment so I reached out to you.

Oh, I almost forgot. I'm also planning to use polydimethylsiloxane as an anti-foaming agent. It seems this reaction makes up lots of foamy bubbles that pop later rather than instantly. I hope a single drop of polydimethylsiloxane works.

 

[Intoxicated]

To react all the 0.128 mol of na2s one would need 0.0853 mol of citric acid. So 16grams of citric acid + 38mililiters of water makes a solution of 30% W/W acid, taking up only 45 to 50mL!

I would take the molar mass of citric acid monohydrate for calculations, since this compound is usually easier to obtain than anhydrous citric acid.

At the worst case with only 150mL of reactants in total can get you approximately 3 liters of H2S assuming my math is correct.

That would need nearly 100% yield. Since near-complete reaction may require a lot of time and some amount of produced gas will remain dissolved in water, it makes sense to consider some approximate target yield for released H₂S - like >50%.

I just couldn't believe how little it actually takes if you use a bag over your head instead of gassing a whole tent-car.

It's also remarkable that respiration will likely stop after just a few breaths of the gas, so the amount of actually consumed H₂S will be even much smaller than that small amount we'd have in the bag.

It seems this reaction makes up lots of foamy bubbles that pop later rather than instantly. I hope a single drop of polydimethylsiloxane works.

It may be useful to carry out some test reaction in a well ventilated area before the real CTB attempt in order to figure out how such reactions tend to go.

 

[atre]

It may be useful to carry out some test reaction in a well ventilated area before the real CTB attempt in order to figure out how such reactions tend to go.

Makes sense, thanks for the heads up. I'll test how antifoam agents work with a safer reaction so I can recreate it anytime I want without causing a stench. Concentrated K2CO3 solution + citric acid solution should give me a safe idea how big the foaming can get.