I am being asked by a colleague if the Polyvinylpyrrolidone (PVP) we buy in our lab is "USP 26" or "USP 42". I've never heard those terms before. I searched up online but found nothing.
I'm sure its something concerning the US Pharmacopeia, but I've found their site to be extremely walled up and unhelpful.
Can anyone tell me what do those terms mean, and how to find out if my PVP is either? The manufacturer's Safety data sheet didn't seem to mention it.
Note: I don't work at a food grade or drug grade lab. I'm also not in the USA.