We got your inquiry about the retatrutide, and actually, we've been supplying it for a while now — most buyers go with the 10mg vial for standdard workups, though the 5mg is better if you're just testing solubility or running small pilot batches.
Purity is verified at 99% or better by HPLC, which is tighter than some of the bulk stuff we've seen out there, and we'll include the COA with each shipment; the endotoxin level is under 1 EU/mg, so it's pretty clean for research use.

It's freeze-dried in sterile glass vials (sterile filtered before lyophilization), and you can reconstitute it in water or buffer without issues — just keep it at -20°C for long-term storage or 4°C for a few weeks, and the shelf life is 36 months or so if you handle it right.
Not really suited for oral dosing at all, since it's a peptide, and we usually have stock on the 2mg and 10mg vials, but the 50mg size sometimes has a 2-week lead time (check on that before you finalize).

One thing that comes up a lot is documentation — we include the full COA and mass spec data, but if you need the SDS or a more detailed TDS for your lab's records, just let us know in the order notes.
Anyway, our company can ship roughly 20-30 vials within a week if you order the 5mg or 10mg sizes, and the pricing is better than reagent-grade alternatives for this spec — just confirm the quantty and we'll send over teh invoice.