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Actually, we've been supplying this to metabolic research labs for a while now, and it basically requires careful handling right form the get-go—reconstitution is mandatory before any assay work. The lyophilized powder is white to off-white, and you'll want to store it at -20°C for teh long haul, though once it's reconstituted, 2-8°C is fine for short-term use.
So the purity checks out at over 99.0%, which we verify, and we usually have a COA ready to share—just confirm lead time if you need it expedited. Most buyers go with the 5mg or 10mg vials for dose-response work, but we also stock 2mg, 15mg, 20mg, 30mg, and 60mg depending on your protocol. The CAS is 2381089-83-2, and the shelf life is better than two years when you keep it dry and dark. It's pretty much useless for anything outside research appliction—don't expect it to be suitable to clinical or human use.
One thing that catches new users off guard is the storage: -20°C isn't optional for the powder if you want those months-to-years stability numbers. We've seen degradation happen within weeks at room temperture, so don't hedge on that.
reconstitution step is what really matters, and you'll need a sterile solvent—typically bacteriostatic water or similar—to get it into solution for injection or assay. Tighter tolerance on the pH here than most peptides we handle, so check your buffer system before mixing. Anyway, the 20mg vial (give or take) is a common starting point for metabolic studies, but the 60mg option is easier if you're running multiple trials.
