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Liz Pompo Majoko asked the Naked Scientists: Hi Chris, I need to know why is the faeces (stool) smell so intolerable? Pinky in Bryanston, GautengWhat do you think?
You may be right that H2S may, in fact, be one of the ingredients that causes feces to be unpleasant. Getting a little dog poop on one's shoe can seem repulsive, but is hardly a danger for the gasses it is emitting. Likewise, if you are the second person to use the bathroom, the dose of toxic gases is hardly dangerous. Oddly, most people hardly notice their own smells while defecating.I still think that a large part of the unpleasant sensation of feces odor would have been the danger of diseases.
Will you please stop talking nonsense.It's hard to express just how stupid this statement is. "Phosgene gas, causes you to want to break dance, uncontrollably,"For a start "Phosgene is an insidious poison as the odor may not be noticed and symptoms may be slow to appear. The odor detection threshold for phosgene is 0.4 ppm, which is four times the Threshold Limit Value. " fromhttp://en.wikipedia.org/wiki/PhosgeneFor a finish, the action of a flame (or an engine) on TCE also generates HCl which would explain the lung irritation you experienced.So, you are talking about the wrong chemical and, as a result of that, you are spouting dangerous gibberish.
Some chlorinated products like Clorox make very little phosgene when you burn it.
Chlorox (at least as far as I understand it) is mainly water. Have fun burning it.
"Hydrochloric acid may also make phosgene gas when burned."Bollocks.No carbon source."Phosgene is immediate, there is no mistaking it."Bollocks.It's well known for the delayed action effect causing death by pulmonary oedema hours or even days after exposure."I believe what you are missing is that when you heat with flame, a substance that creates phosgene gas, like 111, tri-chlorothane. That the amount of gas created is huge compared to the amount of substance needed to create it. "Bollocks.That's inconsistent with the law of conservation of mass."The same is true if you mix, hydroflouric acid and hyrdorchloric acid. Five drops of each substance, mixed together fills a small room with a lethal mixture. "Bollocks5 drops of each is only a few tenths of a gram. Of that typically 40% will be the halide rather than water.A small room contains something like 10 cubic metres.So you would get about 100mg in 10 m3 if it all evaporated at once (it won't).That's 10 mg/m3which is rather less than the IDHL concentrationhttp://www.cdc.gov/niosh/idlh/7664393.html" The gas also rose to the ceiling"HF is a bit less dense than air HCl is rather denser. The mixture is going to pretty much diffuse rather than rise."I have experienced it now many times, mostly at lower concentrations like you get from using a torch on piping that contains residual refrigeration gases."You have repeatedly experiences symptoms that are consistent with HCl, but not phosgene and you have experienced them under circumstances where there would be HCl."So I am pretty confident about what I am saying. "Nobody doubts you confidence, just your accuracy.BTW, found any evidence to support your absurd assertion that the Sun is a big carbon laser yet?"Why the hostility?"Because the purpose of this site is to promote science and you keep cluttering it up with bollocks.
However, since COCl2 is not a major component of feces, aren't we getting off topic a bit?
You are totally not understanding the reality. Break dance is or should be the scientific description of the affect. Sincerely, William McCormick