Celsius°
PEPTIDES
Certificate of Analysis
Starfield Processing Limited · 111 New Union Street
Coventry CV1 2NT · England
Product
GHK-Cu Serum 2%
Lot number
CP2605-3621
Catalogue number
CP-7010
Research area
Dermal Research
Date of manufacture
2026-05-03
Date of analysis
2026-05-07
Retest by
2027-05-02
Appearance
Clear colourless solution
Purity by RP-HPLC (area normalisation, 220 nm)
99.16%
Specification ≥ 99.3%
RELEASED
3/3 parameters within specification
Analytical results
| Test | Method | Specification | Result | Status |
|---|---|---|---|---|
| Appearance | Visual inspection | Clear, colourless, free of particulates | Clear, colourless, free of particulates | Pass |
| Bacterial endotoxin | LAL kinetic chromogenic | ≤ 0.50 EU/mg | 0.143 EU/mg | Pass |
| Solubility | Visual, per stated solvent | Aqueous glycerin base, pH 5.5 | Conforms | Pass |
Figure 1 · RP-HPLC chromatogram
C18, 4.6 × 250 mm, 5 µm. Water/acetonitrile gradient with 0.1% TFA over 20 minutes. Detection at 220 nm.
| Peak | Retention time | Area % | Assignment |
|---|---|---|---|
| 1 | 9.82 min | 0.085 | Des-amido analogue |
| 2 | 9.98 min | 0.321 | Des-amido analogue |
| 3 | 10.20 min | 0.089 | Acetylated analogue |
| 4 | 11.87 min | 99.160 | GHK-Cu Serum 2% |
| 5 | 14.56 min | 0.345 | Deletion sequence |
Figure 2 · ESI mass spectrum
Positive ion electrospray. Observed charge states with theoretical comparison below.
Molecular formula
C14H24N6O4·Cu
Theoretical [M+H]⁺
404.95 Da
Observed [M+H]⁺
404.74 Da
Sequence
Gly-His-Lys · Cu(II)
GHK