GHK-Cu Certificate of Analysis (COA), Lot by Lot

CAS: 49557-75-7
Structure: Copper(II) complex of Gly-His-Lys

GHK-Cu: every lot, every certificate

Each released lot for this compound and the third-party certificate issued for it. Lots that did not pass are never released and never appear here.

Lot	Received	Purity	Identity	Certificate
9001_260821_GHKCU_5	Aug 21, 2026	99.67% HPLC-UV	GHK-Cu LC-MS	Lot page · PDF

What this certificate shows

A GHK-Cu certificate of analysis from ANKR Lab reports two things about one specific lot. Purity is measured by HPLC-UV: the sample is separated by chromatography and the share attributed to the target compound is reported as a percentage. Identity is confirmed by LC-MS, which compares the measured mass of the sample against the expected mass for GHK-Cu. The certificate also carries the lot number, the date the lot was received, and a lab accession code.

Testing is performed by Freedom Diagnostics, independent of ANKR Lab. The accession code printed on each certificate can be checked with the lab directly, so the document is verifiable outside this website.

What a GHK-Cu certificate specifically shows

GHK-Cu, CAS 49557-75-7, is not a plain peptide. It is a copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, and the copper is part of the identity, not a contaminant. That changes what the certificate has to demonstrate. Purity by HPLC tells you about the peptide portion. Identity confirmation has to account for the coordinated copper, which shifts the observed mass relative to the free tripeptide.

A GHK-Cu lot that tests as high-purity GHK with no copper is not GHK-Cu. Colour is a crude but real secondary check: the copper complex is a deep blue, and a lot that reconstitutes colourless warrants a question regardless of what the purity number says.

How to read a GHK-Cu COA

Find the lot number on the vial label. Every ANKR vial carries one. Locate it in the table above.
Open that lot's certificate. The batch ID on the certificate should match the lot on the label.
Read the purity line. The HPLC-UV result is the percentage of the sample identified as GHK-Cu.
Check identity. The LC-MS result confirms the measured mass matches the expected mass.
Verify with the lab if you want to. Use the accession code on the certificate with Freedom Diagnostics.

A longer walkthrough, with a sample certificate marked up line by line, is in How to read a peptide certificate of analysis.

Questions about GHK-Cu certificates

Is every GHK-Cu lot tested before it is released?

Yes. Each GHK-Cu lot ANKR Lab releases is sent to an independent laboratory for purity (HPLC-UV) and identity (LC-MS) testing, and only lots with a passing certificate are released. This page lists every released lot with its certificate. Laboratory research use only.

Who performs the testing?

Testing is performed by Freedom Diagnostics, a third-party laboratory independent of ANKR Lab. Each certificate carries an accession code that can be checked with the lab directly.

How do I match my vial to its certificate?

Every ANKR vial label carries a lot number. Find that lot number in the table on this page, open the lot page or the PDF, and confirm the batch ID on the certificate matches the label.

What does the purity figure on a GHK-Cu certificate mean?

Purity is the percentage of the sample that the HPLC-UV analysis attributes to the target compound. Identity is confirmed separately by LC-MS, which checks the measured mass against the expected mass for GHK-Cu. These are analytical results for laboratory research use only, not statements about use.

GHK-Cu product page · All certificates · Full COA library · How we test

All products are for laboratory research use only. Not for human or veterinary use. Analytical results describe a specific lot and are not statements about any use.