GHK-Cu (Copper Tripeptide-1) — Certificate of Analysis
GHK-Cu
Lot CU100-2026-001 of GHK-Cu assayed at 99.21% peptide purity by RP-HPLC against a ≥95.0% release specification, 4.21 percentage points clear of it. Released 07/15/2026 by ILS Laboratories, ISO/IEC 17025 Accredited. Copper(II) complex of the tripeptide Gly-His-Lys, supplied as a research-grade reagent for matrix biology and metalloprotein studies.
Net peptide content measured 102.51 mg against a 100 mg label — the mass of actual peptide in the vial, as distinct from salts, water and counter-ions. It is reported rather than graded, so it carries no pass/fail.
Full QC panel
| Analyte | Specification | Result | Status |
|---|---|---|---|
| Peptide Purity (HPLC) | ≥ 95.0% | 99.21% | Pass |
| Identity (HPLC-RTM) | GHK-Cu Confirmed | Confirmed | Pass |
| Net Peptide Content | Report Only | 102.51 mg | — |
| Fentanyl Screen | Immunoassay, 50 ng/mL cutoff | Not Detected | Pass |
Sterility & endotoxin
| Test | Specification | Result | Status |
|---|---|---|---|
| Sterility (PCR) | No Growth | No Growth | Pass |
| Endotoxin (USP <85>) | Report Result | NMT 0.05 EU/mL | Reported |
Endotoxin is reported as a measured value rather than graded pass/fail: acceptable limits depend on route and matrix, and no universal threshold applies to research-use material. The laboratory reports the figure and leaves the judgement to you.
Elemental impurities
| Panel | Method | Result | Status |
|---|---|---|---|
| Arsenic, cadmium, chromium, lead, mercury | ICP-MS, USP <233> | 5 of 5 under limit | Pass |
Per-element measurements are on the signed certificate below and in the laboratory's own record.
Reference data
| Property | Value | ||
|---|---|---|---|
| Compound | GHK-Cu (Copper Tripeptide-1) | ||
| Also known as | Copper tripeptide-1, Copper peptide, GHK-Cu, Glycyl-L-histidyl-L-lysine copper(II), Prezatide copper acetate (related), Cu-GHK | ||
| Sequence | Gly-His-Lys (GHK) | ||
| Molecular formula | C14H22CuN6O4 | ||
| Molecular weight | 340.4 g/mol | ||
| CAS number | 89030-95-5 | ||
| Physical form | Lyophilized powder | ||
| Storage | Store lyophilized powder at -20C protected from light and moisture; stable for up to 24 months. Aliquot reconstituted solutions and store at -20C to avoid repeated freeze-thaw cycles. | ||
Check this certificate with the laboratory, not with us. Open the laboratory's own record of lot CU100-2026-001 — a page we neither host nor control. Holding a vial already? Look up its lot number. For research use only.
The signed certificate
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