Link to USP web site where they define USP grade.
Dr Oz has credentials also. Wasn't he in front of congress not to long ago?
Reference or it's propaganda.
MSDS has no relevancy. Are those tests performed after they transfer it to their containers? What is the baseline acceptable purity for e-cigarette usage, along with all the separate chemicals tested for?
This one:
https://cdn.shopify.com/s/files/1/0307/9897/files/Dow_Propylene_Glycol_COA.pdf?3921
has more stuff on it. Looks more impressive. lol
Links. I've searched for the term USP grade. It has nothing to do with Pharmaceutical Grade, and actually there is no information on the term you keep pushing USP grade.
Dow makes a Pharmaceutical Grade liquid, listed as USP/EP
Propylene Glycol USP/EP | Dow Propylene Glycols
USP Verified Pharmaceutical Ingredients
DOW PuraGuard™ Propylene Glycol USP/EP Earns First and Only PG Third-party Quality Certification from IPEA | Business Wire
Now a chemist telling the community what is acceptable for usage? Nice to know you also practice medicine.
Since the first paragraph has no links to verifiable data, only the same crap you've been spewing which I've already proven is wrong, then the rest TL DR.