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Re: Smelly bubbles



> Another possibility is SO2 which is also toxic and has the rotten
> egg smell but not as deadly as H2S. 
> 
> Steve
> 
>
	SO2 does not smell anything like H2S.  It has a sharp, acidic
smell.  SO2 is also quite soluble in water and unlikely to
appear as bubbles.


Paul Sears,    Ottawa, Canada.