KLOW Blend Pen certificate of analysis, lot PL-2610-113
Certificate PL-26-00227 reports the release tests for KLOW Blend Pen lot PL-2610-113: 99.40% purity by reverse-phase HPLC and identity confirmed by LC-MS, tested October 6, 2026. The lot number printed on each unit matches this certificate.
| Certificate number | PL-26-00227 |
|---|---|
| Lot number | PL-2610-113 |
| Compound | KLOW Blend Pen 240 mg |
| Purity (RP-HPLC) | 99.40% |
| Identity (LC-MS) | Conforms (4 / 4) |
| Method | RP-HPLC (UV 214 nm) + LC-MS |
| Tested | October 6, 2026 |
| Retest by | October 5, 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 | 99.73% · 0.15% · 401.89 Da (PASS) |
| BPC-157: purity · largest impurity · mass | RP-HPLC 214 nm (area%); LC-MS, ESI+ | ≥ 99.0% · ≤ 1.0% · ± 1.0 Da | 99.40% · 0.44% · 1,419.50 Da (PASS) |
| TB-500: purity · largest impurity · mass | RP-HPLC 214 nm (area%); LC-MS, ESI+ | ≥ 99.0% · ≤ 1.0% · ± 1.0 Da | 99.48% · 0.34% · 4,963.47 Da (PASS) |
| KPV: purity · largest impurity · mass | RP-HPLC 214 nm (area%); LC-MS, ESI+ | ≥ 99.0% · ≤ 1.0% · ± 1.0 Da | 99.82% · 0.10% · 342.44 Da (PASS) |
| Assay (total blend) | Assay vs label claim | 76–84 mg/mL | 81.93 mg/mL (PASS) |
| Bacterial endotoxin | LAL, kinetic | ≤ 5.0 EU/mg | 0.285 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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