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We've been getting inconsistent results from the standard GLP-1 analogues we were sourcing, batch-to-batch variability was eating into our timelines, so I ordered this Arg34GLP-1(9-37) intermediate to tighten up the synthesis work for the GLP-1 receptor binding assays where we need a clean starting point.
The ≥99% purity by HPLC is the main reason I went with this—most supliers hover around 97-98% and you can see the difference in the, especially when you're working at low nanomolar concentrations where every impurity throws off the signal.
Storage is -20°C protected form light, which is standard for this class of peptides, but what I didn't expect was the powder being soluble in water and DMSO with no noticeable residue—that actually saves us a centrifugation step we usually have to do with the cheaper stuff.
Molecular weight is 338.36 g/mol and the CAS is 1169630-82-3, so it matches what we need for patent work, and we'll probably request a COA on the first batch to confirm the HPLC trace before scaling up the order.
Lead time was about 10 business days for the 5g vial we got, though they mentioned customized packaging is avaliable if we need different gram sizes or vials for the long-term storage—we usually have stock of the 100mg vials, but confirm lead time for teh larger quantities.
It's not suited for anything involving in vivo work since it's research use only, and the -20°C requrement means you'll need a dedicated freezer if you're ordering more than a couple vials at a time—basically, it's a solid intermediate for early-stage work but don't expect it to handle like a finished drug substance.
We don’t have a fixed MOQ for custom packaging — we work with you based on your batch size. Typically, clients order in gram or multi-gram quantities, but we can adjust for smaller research needs too.
Yes, every batch comes with a COA confirming ≥99% purity by HPLC. We can also share the mass spec and NMR data if you need it for your documentation.
Standard lead time is 5–10 business days after order confirmation, depending on the quantity and packaging specs. Custom packaging might add a couple of days, but we’ll give you a firm timeline upfront.
Yes, when stored at -20°C and protected from light, it stays stable for at least 12 months. Just avoid repeated freeze-thaw cycles — aliquot it if you’re using it over time.
We primarily supply it as a white to off-white powder, but if you need it pre-dissolved in water or DMSO, we can discuss that as a custom request. It’s not our standard option, though.
