GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine. The free tripeptide has a molecular weight of 340.38 g/mol, and the copper complex is registered under CAS 89030-95-5. Nexyra Labs supplies it as a lyophilized powder strictly for controlled laboratory research use.

Why is GHK-Cu powder blue?

The colour comes from the coordinated copper(II) ion rather than from the peptide itself. A blue to blue-violet lyophilized cake is the expected appearance for the complex.

How is the purity of a GHK-Cu lot established?

Through third-party HPLC-UV and mass-spectrometry analysis performed on that specific production lot. The resulting report is published against the lot number so it can be matched to the vial in hand.

How should GHK-Cu be handled?

Research materials should be handled in accordance with applicable laboratory procedures and any documentation associated with the specific material. Customers are responsible for appropriate handling of purchased materials.

What is this material intended for?

Research Use Only. Every item Nexyra Labs supplies is intended strictly for controlled laboratory research and is not for human or veterinary use.

Peptide Profiles

GHK-Cu: technical research profile

A reference profile for the copper tripeptide GHK-Cu covering sequence and molecular data, copper coordination, how purity is established per lot, and how to review the condition of the lyophilized material.

Identification and molecular data

Property	Value
Common name	GHK-Cu (copper tripeptide-1)
Peptide sequence	Gly-His-Lys (GHK)
CAS number (copper complex)	89030-95-5
Free tripeptide molecular weight	340.38 g/mol
Complex composition	GHK coordinated 1:1 with copper(II)
Physical form	Lyophilized powder, blue to blue-violet
Solubility	Water soluble
Catalog format	50 mg single-use vial

Values describe the material as catalogued. Lot-specific analytical results are published on the product page for the lot in hand.

Technical profile

Molecular characteristics

GHK is a tripeptide built from glycine, L-histidine and L-lysine, with a free-peptide molecular weight of 340.38 g/mol. In the GHK-Cu complex the peptide coordinates a copper(II) ion, primarily through the imidazole nitrogen of the histidine residue and the backbone amide nitrogen, giving the characteristic blue colouration of the lyophilized powder. The copper complex is catalogued under CAS 89030-95-5.

Analytical identity and purity

Identity and purity for laboratory material are established per production lot, not per product name. Nexyra Labs publishes third-party HPLC-UV and mass-spectrometry results against the specific lot that was tested; the current GHK-Cu lot is reported at 99.6% purity by Finnrick Analytics. Match the lot number printed on the vial to the lot named on the report before entering the material into a record.

Condition on arrival

Inspect the seal and the appearance of the cake or powder on receipt and record anything unexpected. Customers are responsible for appropriate handling and storage of purchased materials.

Documentation and traceability

Every item is tracked by lot through packing and fulfillment. Analytical reports describe only the material that was tested and are never reused across lots or across different products, so documentation status is always read from the current product page rather than assumed from a previous order.

Common questions

What is GHK-Cu?: GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine. The free tripeptide has a molecular weight of 340.38 g/mol, and the copper complex is registered under CAS 89030-95-5. Nexyra Labs supplies it as a lyophilized powder strictly for controlled laboratory research use.
Why is GHK-Cu powder blue?: The colour comes from the coordinated copper(II) ion rather than from the peptide itself. A blue to blue-violet lyophilized cake is the expected appearance for the complex.
How is the purity of a GHK-Cu lot established?: Through third-party HPLC-UV and mass-spectrometry analysis performed on that specific production lot. The resulting report is published against the lot number so it can be matched to the vial in hand.
How should GHK-Cu be handled?: Research materials should be handled in accordance with applicable laboratory procedures and any documentation associated with the specific material. Customers are responsible for appropriate handling of purchased materials.
What is this material intended for?: Research Use Only. Every item Nexyra Labs supplies is intended strictly for controlled laboratory research and is not for human or veterinary use.

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