Surprisingly few. I would have expected anything arriving in US stores at an industrial level would have suffered from industrial levels of processing and storage-related chemicals, but a quick skim of wikipedia reveals essentially none. Huh.

https://en.wikipedia.org/wiki/Coffee_production

https://en.wikipedia.org/wiki/Coffee_production

Ethyl acetate is sometimes used in decaffeination.

https://en.wikipedia.org/wiki/Decaffeination#Solvents_used_i...

Trichloroethylene, acrylamide, and many more including pesticides like Aldrin, Dieldrin, Chlordane and Heptachlor.