Yep, that's the stuff. Everything is toxic in excess, even water... lol
Seriously, You can read the MSDS sheet, it's not going to hurt you. I've been cutting 36mg for around 6 months with that bottle and it's fine.
PG is the same thing that's in the factory carts. The USP part means it's tested and tracked with lot numbers, and it's PURE. Which means it's *better* that the stuff from China, which has god-knows-what in it. Ok Dokey?