Does the odor of plastics, metals and other solids have quality, and if not, what is the composition of those odors?
The smell of liquid and gas should be the result of the reaction between the molecules of those substances and the human olfactory organs, but the solid things have not escaped in the form of molecules or atoms, so does the smell of the solid have mass, and what is it without mass?

No best answer

For the plastic part, there are two possibilities
1 Plastics are generally polymers, such as polyethylene and polyvinyl chloride. Then, as the main component of plastic, it may be flavorful.
2 The plastic body has no taste, but the plastic we got is not the body, but the finished product through industrial processing. It also contains substances such as additives and impurities. These substances may be odorous. The polyvinyl chloride plastic bags that have been circulating for a long time cannot be used for packaging food because of the residue of toxic additives caused by the manufacturing industry of polyvinyl chloride plastics.
In summary, the smell of plastics can also be caused by impurities contained in plastics.
3.The source of metal odor is more complicated. At present, it is considered to be the odor of small molecules produced by the interaction of some human body surface tissues with metals; or the odor of small molecules produced by impurities in metals.