We've been shipping this one to labs across the UK for a while now, and most researchers go with the 10mg per vial for their dose-response work, though it's not suited for anything beyond controlled in vitro studies.

Purity comes in at 99.7% by HPLC—better than reagent grade for this kind of work, and we usually have COAs on hand for each batch, but confirm lead time if you need them fast.

It's a white powder, stored at 2-8°C away from light, and what it does is enable consistent GLP-1 receptor binding studies without the variability you'd get form lower-grade matrial.
10 is the standerd packaging, and our company can do bulk orders (50 units or so) without much hassle, though the MOQ might shift depending on stock.

One thing most buyers don't think to ask is that the reconstitution buffer matters a lot—we've seen solubility issues with plain saline, so use the right one.

Anyway, we usually have stock in our UK warehouse, but shipping times are roughly 20 days or so depending on your location.