Method A method that is untraceable

[nita]

I would like to ctb, and would like to do so in a way that looks like an accident (preferably a heart attack) such that normal autopsy can't discover any evidence of a suicide. I would like my body to look normal (not mangled like traffic accidents, bridge jumping, building jumping,...) so a pill or a substance would be preferable.
I have access to a chemistry lab, so I can choose to ingest any chemical (arsenic,...) but preferably one that is painless and untraceable. I have a background in chemistry, and can synthesize and purify compounds, however the lab is public so the process need to be fast and discrete.
Nitrogen or inert gas is not an option as i would need an accomplice to remove the gas mask (or bag) after i'm done, gas leak is not an option as there isn't enough gas to do so.

 

[Lulzacruel]

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this is probably really painful but maybe chlorine gas


just vinegar and bleach and the gas should be enough to eviscerate your lungs.


at worst, they will think you were stupid and didn't listen to your training since this is a rookie mistake for chemists


keep it in a enclosed space so no gas leaks out and all the air is replaced with chlorine gas

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