right? Like I know what that means, chemistry-and-physics-wise, but the part of my brain that detects foreboding is whispering “it’s giving Dr. Manhattan” into my ear

There are acids that, while theoretically less dangerous than Helonium, can actually be stored in bulk. Some more easily than others. Derek Lowe's "Things I Won't Work With" column provides some excellent examples, like dioxygen difluoride (possible to store, but not done, because... why would you)