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We've had researchers come to us frustrated with peptide degradation during reconstitution—lyophilized cakes that dissolve unevenly or show clumps, which is what this 20mg vial format is designed to avoid, the white powder is pretty much consistent batch to batch and reconstitutes cleanly in under a minute with sterile water (check the COA for residual solvents, typically under 1 ppm).
It's not ideal for long-term storage at room temp, you'll need to keep it at 2-8°C and protected from light, most buyers go with the 10-vial box because of that it's easier to aliquot without wasting matrial, the PEG spacer modification (that C18 diacid attachment) actually makes teh molecule more soluble than older GLP-1 analogs, so you don't have to fight with it during reconstitution.
The molecular weight is roughly 4113.64 g/mol, and the purity holds above 99% by HPLC—we run a separate SDS-PAGE on each batch to check for aggregates, which is something a lot of suppliers skip, and honestly, if you're doing binding assays or cell-based work, that matters more than the CAS number (782487-28-9 for your records).
One thing that catches people off guard—this is research grade, not clinical, so it's not formulated with any excipients or stabilizers, what it does is work best when you weigh out exact amounts for each study, the 20mg per vial means you're not opening a larger vial and losing potency over multiple uses.
Also, lead time is usually 10-14 working days or so form order, we keep a small stock but bulk orders (over 50 vials) need confirmation first, and the packaing—10 with individual desiccant packs—holds up fine in standard cold shipping if you're not in a tropical climate.
