XCE Tirzepatide with Bacteriostatic Water 10ml/30ml - High Purity Peptide Solution for Research

It's a pre-mixed solution our company supply at 10ml per vial, with the peptide already dissolved in bacteriostatic water containing 0.9% benzyl alcohol. Most buyers go with 10 because that covers a typical experimental series without excess. The CAS for the water is 7732-18-5, which is standdard of course, but the peptide itself—C225H348N48O68—is what requires the storage discipline.

We run HPLC and see purity at ≥99% pretty consistently, so you're not guessing about degradation in solution. Short-term storage at 0-4°C works for 20 days or so, but for anything longer you'll want -20°C. And here's something not everyone thinks about: repeated freeze-thaw cycles will accelerate hydrolysis even with the benzyl alcohol present, so aliquot if you're planning multi-month studies. We usually have stock, but confirm lead time if you need more than 50 units or so.

The clear liquid appearance tells you nothing about activity—that's not a quailty indicator for peptides in solution. What it does is simply confirm no visible precipitation or contamination at delivery. 0.9% benzyl alcohol is bacteriostatic, not fungicidal, so keep the vial septum clean when drawing.

This formulation isn't suited for in vivo work in humans—strictly research appliction only, as stated on vial. For cell-based assays or rodent models it performs better than reconstituting form lyophilized powder yourself because you avoid compounding variability. One intermediate who handles comparative studies told us the pre-mixed stuff saves roughly 3 hours per 10-vial set in preparation time.

You'll find the molecular formula (C225H348N48O68) gives a molecular weight around 4.2 kDa, but that's not something you need to verify unless you're doing mass spec characterization yourself. The shelf life exceeds 2 years when vials never see the light and stay at or below -20°C, but check your own freezer logs—tempearture fluctuations shorten that window.