Ac-SDKP (Thymosin Beta-4 Fragment 1-4) Capsules certificate of analysis, lot PL-2610-214
Certificate PL-26-00326 reports the release tests for Ac-SDKP (Thymosin Beta-4 Fragment 1-4) Capsules lot PL-2610-214: 99.65% purity by reverse-phase HPLC and identity confirmed by LC-MS, tested October 8, 2026. The lot number printed on each unit matches this certificate.
| Certificate number | PL-26-00326 |
|---|---|
| Lot number | PL-2610-214 |
| Compound | Ac-SDKP (Thymosin Beta-4 Fragment 1-4) Capsules 500 mcg × 60 |
| Molecular formula | C20H33N5O9 |
| CAS number | 127103-11-1 |
| Purity (RP-HPLC) | 99.65% |
| Identity (LC-MS) | Conforms (487.48 Da) · expected 487.51 Da, found 487.48 Da |
| Method | RP-HPLC (UV 214 nm) + LC-MS |
| Tested | October 8, 2026 |
| Retest by | October 7, 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 |
|---|---|---|---|
| Identity (mass) | LC-MS, ESI positive | Theoretical ± 1.0 Da | 487.48 Da (PASS) |
| Purity | RP-HPLC, UV 214 nm, area% | ≥ 99.0% | 99.65% (PASS) |
| Largest impurity | RP-HPLC, area% | ≤ 1.0% | 0.23% (RT 7.70) (PASS) |
| Capsule content | Content vs label claim | 0.45–0.55 mg/cap | 0.49 mg/cap (PASS) |
| Bacterial endotoxin | LAL, kinetic | — | — (N/A) |
| Aerobic count (TAMC) | USP <61> | < 10 CFU/g | < 10 CFU/g (PASS) |
| Yeast & mold (TYMC) | USP <61> | < 10 CFU/g | < 10 CFU/g (PASS) |
| E. coli | USP <62> | Absent | Absent (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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