I did not mean that they are overly acidic. They are caustic to some degree, the worst of course being as you mentioned the Ilfochrome blix. But you still don't want to breathe their fumes or get them in your eyes.
They have to be able to etch Silver but that's about it. Their fumes are likely much more harmless than those from most developers, and likewise I would expect most developers to be much worse to your eyes, too. To my best knowledge, Ferric EDTA is used orally to treat insufficient Iron intake.
Trying to be the best of whatever I am, even if what I am is no good.