Metal Expansion Properties

[berkeman]

Um, could you please use your words?

 

[moriah]

Per our previous conversation, I am investigating these strange sewer like fumes to which I react. Is there a possibility that I am reacting to a combination of H2S and CH4?

 

[Baluncore]

I am investigating these strange sewer like fumes to which I react. Is there a possibility that I am reacting to a combination of H2S and CH4?

I would discount carbon disulfide, CS₂, as the smell you report. Carbon disulfide does not smell bad. There are many other more common sulfur based contaminants that stench, and so will mask the sweeter smell of CS₂.

CS₂ will not be produced by reactions in sewer gas. The synthesis of CS₂ require an industrial process at much higher temperatures.

CS₂ is a neurotoxin. In high concentrations it is known to cause psychosis in industrial workers. I am confident that CS₂ is not at sufficient levels to cause you to imagine the problem.

The odor you are sensing is probably a thiol or thiol derivative. We are very sensitive to the smell of those compounds.
https://en.wikipedia.org/wiki/Thiol#Odor