QSC Tirzepatide Factory Supply 99% Purity Weight Loss Peptide CAS 6893-02-3

We've been chasing a consistent supply for months, and the purity variance between batches was driving us crazy—finally landed on this suppiler after testing three others, and the HPLC results came back at 99.2% which is tighter than our internal spec of 98.5% for research use.

The lyophilized powder is what you'd expect, white and free-flowing, but what caught my eye was the molecular weight check at 4813.5 g/mol matching the C225H348N48O68 formula within acceptable tolerance, and the CAS numbers (6893-02-3 or 2023788-19-2 depending on your system) were clearly listed on the COA—no ambiguity there.

Storage is pretty standerd for this class: 2-8°C for short-term, and they recommend -20°C if you're holding stock for more than 6 months or so, though we usually burn through it in 20 days so fridge is fine—just keep it sealed and away from light, which is a detail some buyers overlook.

Solubility in water or buffer is straightforward, but one thing I noticed is the vial sizes are specifically 5mg, 10mg, 15mg, and 30mg, which covers most of our protocol needs without forcing us to reconstitute a 30mg vial for a 5mg test run—something we've dealt with on other peptides.

This isn't suited for anything beyond research use—obviously not for clinical or human application—so make sure your team understands that, and the shelf life claim of >2 years seems reasonable base on our accelerated stability data, but I'd still rotate stock every 12 months to be safe.

Also, MOQ was manageable for our lab (confirm with your account manager since it varies by region), and the lead time was about 2 weeks from order to delivery, which is better than the 4-6 weeks we were seeing from other Asian suppilers.