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We've been sourcing QSC Tirzepatide for peptide research for about 18 months now, and the purity is consistent at 99.9%—that's verified 's HPLC report.
The molecular weight runs about 4813 g/mol, and the CAS is 2023788-19-2 (usually needs confirming with your customs broker). Appearance is always white to off-white powder, nothing unusual there. Most buyers go with the 10mg or 15mg vials for typical assays, but 30mg works if you're running in larger volumes. 5mg is pretty much only for very low-dose studies or preliminary screening.
It's not ideal for anything involving long-term stability at room temperture, since storage spec is -20°C and dry conditions basically. So if you're planning to store it in a lab fridge for weeks or so, plan for periodic freezer transfers. For reconstitution, I'd recommend 100mM PBS at pH 7.4 or similar—we've found it holds solubility better than some other solvents.
Batch-to-batch consistency is tight within about 0.1% deviation, give or take, which is better than reagent grade for this sort of research peptide. One thing nobody mentions is that the powder can clump after multiple freeze-thaw cycles if you don't keep teh dessicant pack in the vial. So store it in smaller lots.
MOQ is 50 vials across any size mix (e.g., 20 x 5mg + 30 x 10mg), and lead time is usually 15-20 days but confirm for larger orders. We usually have stock, but bulk orders above 500 vials might need a 2-week production window. You'll get full COA, HPLC, and mass spec with each batch—they also include a TDS if you request it. Anyway, that's the standerd routine.
For the pharmaceutical grade, it's not intended for human or veterinary use; strictly research only. The EC number 200-001-8 matches, though honestly we rarely cross-check that.
