Azoth resists a single modern chemical identification because the word operated at more than one level across the alchemical literature: as a broad philosophical concept describing a universal animating principle in much of the wider tradition, and as Paracelsus's own name for a specific, narrower medicinal mercury preparation in his personal writings, two usages that later readers, including some modern popular accounts, have not always kept properly separate. This atlas follows the more cautious scholarly position, associated with historians including Charles Webster and Lawrence Principe, that treats the philosophical azoth as a genuine concept without a fixed chemical referent, while acknowledging that Paracelsus's own specific preparations, where his texts describe them concretely enough to analyze, likely did involve real mercury compounds of one kind or another.
Assigning azoth a single formula, or forcing it onto plain quicksilver as though the two words were simply synonyms, would flatten a genuinely layered piece of alchemical vocabulary into something simpler and more certain than the historical record actually supports. Some later commentators, writing well after Paracelsus's own lifetime, went further still and used azoth as a near synonym for the philosophers' stone itself, a third layer of meaning this atlas notes without adopting, since conflating the sought after end product with the animating means believed to reach it blurs a distinction the more careful alchemical writers took real care to keep separate.