Three independent tests. Every lot. No exceptions.
Every lot is verified for purity, identity, and endotoxin clearance before it leaves the cold room. If any of the three tests fail, the lot does not ship.
Reverse-phase HPLC
Purity quantified by reverse-phase HPLC. ≥ 99% required.
LC-Mass Spectrometry
Identity confirmed by liquid chromatography mass spec. Molecular mass matched against the published reference value.
LAL Endotoxin Assay
Endotoxin clearance verified by Limulus Amebocyte Lysate. Below detection limit required.
Sourced through Cocer Peptides. Backed by a purity guarantee.
Pure North Peptides is a subsidiary of Cocer Peptides. We source our compounds through Cocer and publish Cocer's third-party HPLC lab results and Certificates of Analysis, so researchers can review the same independent analysis our supply chain relies on.
Every product is backed by a purity money-back guarantee tied to its published COA: if independent testing shows a product does not meet the stated purity on its Certificate of Analysis, you get a full refund.