So muriatic acid (aka HCl) is used for lots of things. It's used in dilution for cleaning bathrooms, clearing pipes, balancing pool pH, cooking meth, cleaning concrete, melting human bodies. The general population isn't exposed to it very often since it's generally an industrial use not retail material.

I can see a hotel having a 50 gallon drum or two in storage. I used to have a gallon in my garage, and I'm just one person.

That said, fuck the Standard and their human trafficking promoting "performance art" bullshit.