the bottles I use to have had no warnings: I use it for years on my eyes, especially styes, and pink eye etc. works wonderful. check out the brand, get good quality. go to health food shop, its appox 18.00 for 2oz. expensive. but safe. make your own simple, and cheap. I did it for years and still do. even babies in the early part of the century used it for their eyes: silver water they called it. I would not go over 10PPMs for eyes and drinking. 5-10 is good. flu season hit 10PPM. I take a shot glass morning and shot glass evening. next day feeling a whole lot better. 3rd day back to normal. make sure you have yogurt, afterward appox 4 days.

No idea, I used CS in my eyes for years.

probably liability.

personally, i would not put any CS in my eyes that i didnt make myself. you have no idea what is in the stuff in stores. your own properly made CS can be used in any orifice.