TB-500 (Thymosin Beta-4) certificate of analysis, lot PL-2610-199
Certificate PL-26-00312 reports the release tests for TB-500 (Thymosin Beta-4) lot PL-2610-199: 99.31% 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-26-00312 |
|---|---|
| Lot number | PL-2610-199 |
| Compound | TB-500 (Thymosin Beta-4) 10 mg |
| Sequence | Ac-SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES-OH (43 residues; N-acetyl; free C-terminus) |
| Molecular formula | C212H350N56O78S |
| CAS number | 77591-33-4 |
| Purity (RP-HPLC) | 99.31% |
| Identity (LC-MS) | Conforms (4,963.25 Da) · expected 4963.44 Da, found 4963.25 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 | 4,963.25 Da (PASS) |
| Purity | RP-HPLC, UV 214 nm, area% | ≥ 99.0% | 99.31% (PASS) |
| Largest impurity | RP-HPLC, area% | ≤ 1.0% | 0.40% (RT 15.60) (PASS) |
| Water content | Karl Fischer | ≤ 5.0% | 3.02% (PASS) |
| Bacterial endotoxin | LAL, kinetic | ≤ 5.0 EU/mg | 0.043 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.
TB-500 (Thymosin Beta-4) · Verify this certificate · All certificates
All TB-500 (Thymosin Beta-4) certificates
Other TB-500 (Thymosin Beta-4) lots
- PL-26-00311, lot PL-2610-198, 99.61%, tested October 8, 2026
- PL-26-00102, lot PL-2609-102, 99.53%, tested September 19, 2026
- PL-26-00101, lot PL-2609-101, 99.74%, tested September 19, 2026
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