We were getting inconsistent results with some of the other peptides floating around, and for a project this size, variable purity just isn't worth the headache.
going with a known GLP-1/GIP dual agonist like this was actually straightforward call for that specific assay we're running.

They claim ≥99% by HPLC, which is tighter than a lot of the reagent-grade stuff we've seen, and the 4813.5 g/mol molecular weight matches what we expect for this compound.

Storage is pretty unforgiving at -20°C in a dry enviroment (we usually have stock, but confirm lead time to avoid any temperture excursions).

Also, for what it's worth, the 10mg vial is the sweet spot for most of our in vitro work—dissolves cleanly in water—but yeah, it's definitely not formulated for injection or any in vivo use.
Anyway, we'll just pull form the 2mg, 5mg, 10mg, or 15mg options depending on what the team prefers; between the MOQ and the COA per batch, it basically checks the boxes.