GKP Blend Pen certificate of analysis, lot PL-2610-080
Certificate PL-26-00199 reports the release tests for GKP Blend Pen lot PL-2610-080: 99.52% purity by reverse-phase HPLC and identity confirmed by LC-MS, tested October 5, 2026. The lot number printed on each unit matches this certificate.
| Certificate number | PL-26-00199 |
|---|---|
| Lot number | PL-2610-080 |
| Compound | GKP Blend Pen 210 mg |
| Purity (RP-HPLC) | 99.52% |
| Identity (LC-MS) | Conforms (3 / 3) |
| Method | RP-HPLC (UV 214 nm) + LC-MS |
| Tested | October 5, 2026 |
| Retest by | October 2, 2028 |
| Tested by | Manufacturer’s in-house laboratory (not an independent third-party test) |
| Conclusion | Conforms |
Tests run on this lot
| Test | Method | Specification | Result |
|---|---|---|---|
| GHK-Cu: purity · largest impurity · mass | RP-HPLC 214 nm (area%); LC-MS, ESI+ | ≥ 99.0% · ≤ 1.0% · ± 1.0 Da | 99.57% · 0.24% · 401.90 Da (PASS) |
| BPC-157: purity · largest impurity · mass | RP-HPLC 214 nm (area%); LC-MS, ESI+ | ≥ 99.0% · ≤ 1.0% · ± 1.0 Da | 99.52% · 0.35% · 1,419.63 Da (PASS) |
| KPV: purity · largest impurity · mass | RP-HPLC 214 nm (area%); LC-MS, ESI+ | ≥ 99.0% · ≤ 1.0% · ± 1.0 Da | 99.71% · 0.19% · 342.41 Da (PASS) |
| Assay (total blend) | Assay vs label claim | 66.5–73.5 mg/mL | 71.12 mg/mL (PASS) |
| Bacterial endotoxin | LAL, kinetic | ≤ 5.0 EU/mg | 0.317 EU/mg (PASS) |
| Sterility | USP <71>, 14-day | No growth | No growth (PASS) |
What these results mean
HPLC purity is the share of UV-detectable material that elutes as the target compound; it is not the same as net peptide content, which also accounts for water and counter-ions. Identity means the measured mass matched the mass calculated for the compound. A certificate reports only the tests run on this lot; endotoxin, sterility and contaminant panels are not part of standard lot release. How to read a certificate of analysis.
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