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If you're running dual agonist studies, the GIP affinity here is noticeably stronger than what you'd get with semaglutide or liraglutide—it's actually whole point of switching to tirzepatide for comparative work, and the 99% purity (HPLC verified) means you're not chasing artifacts form truncated peptides or residual solvents.
We store ours at -20°C long-term, and it's pretty much stable for 12 months or so under those conditions, but once reconstituted you'll want to use it within 2-3 days unless you're aliquoting and freezing again—most labs we deal with just order 50mg vials and batch their dosing.
The CAS is 2023788-19-2, molecular weight 4813.45 g/mol, and it's a white powder that looks like any other lyophilized peptide you've handled—but what you don't see on the spec sheet is that the residual TFA content can vary between batches (usually <2%), so if your assay is sensitive to counterion effects, just ask for the COA on that specifically.
2-4 weeks lead time is typical for orders under 10 grams, but we've had on the 100mg vials before because demand spiked—check availability before you commit if you're planning a large study.
This isn't for oral gavage work obviously, since the peptide degrades in the GI tract, but for subcutaneous injection models in mice or rats, teh dual mechanism gives you better weight loss curves than GLP-1 alone—just don't expect it to work in cell-free systems without proper reconstitution buffer.
