Certificate of Analysis Library
Verify your exact vial
Every production run is tested independently, and the certificate for that run is published here. Find the lot number printed on your vial to pull up the analysis for what's in your hand — not a generic sample.
New to certificates? How to read a peptide COA, section by section, on one of our own lots.
Lot SK100001Currently shipping10mgTested Aug 202699.83% HPLC
Can't find your lot, or the certificate doesn't match what you expected? Tell us. Our Purity Guarantee stands behind every batch: if independent testing doesn't confirm the stated purity, you get a full refund and a free replacement.