Exhaust pipe inner coating asbestos-containing?

Grey KG pipe with deposits of limescale, calcium, and other unappetizing substances. You don’t want to and don’t need to know that in detail. No asbestos.

Urine stone, lime

If that were to be found in the exhaust pipe, I would still have concerns, although for different reasons. In this respect, I am more likely thinking of dampened dust, possibly wallpaper residues? Even if there were something harmful in there, since it is an exhaust pipe, it is relatively irrelevant.

Therefore:

Carefully pull out a little of the duct and send it to a laboratory. Which one or where, you can google.

I'm falling apart. Are you serious? Why?
1. Why should an exhaust pipe be lined with asbestos?
2. Does he have to remove the pipe?
3. Why does my head hurt from shaking it so much?

I misread that. I thought it was the drain pipe. Nevertheless, it is a KG pipe in gray. No asbestos.

I'm breaking down. Seriously? Why?

Quite simple: not so that you break down, but so that the OP has certainty for themselves about _what_ it is! Because let's be clear: Those who do the "advice" here are not experts.

So so, exhaust pipe guest WC. Then I'll put it this way: It is probably a mixture of dust, occasional moisture, and flatulence residues from different eras of the temporary visitors in this dwelling.