I also first thought of Hermes (and then Hephaestus), but I think the alchemy association is through Hermes Trismegistus, who combines the messenger functions o

I also first thought of Hermes (and then Hephaestus), but I think the alchemy association is through Hermes Trismegistus, who combines the messenger functions of Hermes with Thoth, the Egyptian god of writing and magic. https://en.wikipedia.org/wiki/Hermes_Trismegistus https://en.wikipedia.org/wiki/Hermes_Trismegistus