PrymaLab AnalyticalCertificate of Analysis · Lot release · tested in-housePrymaLab Analytical · Attn: Sample intake · 3705 Music Branch Rd · Ashland, KY 41102 · United States
Certificate number
PL-26-00102
Key
TZ5SX6M6
Verify at prymalab.net/testing/verify/
TB-500 (Thymosin β4) 10 mg Lot PL-2609-102 · analysed September 19, 2026 · issued October 3, 2026
Purity · RP-HPLC99.53%Specification 99.0% • main peak at 6.08 min
Identity · Observed Mass4963.7 DaTheoretical 4963.5 Da • +0.2 Da (40 ppm)
ConclusionPASSMeets every specification for the tests performed
The certificate
Summary
| Compound | TB-500 (Thymosin β4) N-acetyl thymosin β4, full-length 43-residue peptide |
|---|---|
| CAS number | 77591-33-4 |
| Molecular formula | C212H350N56O78S |
| Theoretical mass | 4963.5 Da |
| Sequence / structure | Ac-SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES-OH (43 residues; N-acetyl; free C-terminus) |
| Appearance | White lyophilized powder |
| Storage | −20 °C, desiccated, dark |
| Label claim | 10 mg/vial |
| Lot number | PL-2609-102 |
| Certificate number | PL-26-00102 |
| Date of analysis | 2026-09-19 (retest 2028-09-18) |
| Purity (RP-HPLC) | 99.53% |
| Identity (LC-MS) | 4963.7 Da |
| Water content (KF) | 1.9% |
| Endotoxin (LAL) | 0.08 EU/mg |
| Sterility | No growth; conforms |
| Conclusion | PASS |
| Tested by | PrymaLab Analytical (PrymaLab's own laboratory, Ashland, KY). In-house result, not an independent third-party test. |
Third-party testing guarantee. Have this product tested by any independent laboratory. If the result does not come back as the compound named on the label, at the purity and amount stated, we refund your order in full and reimburse the cost of the test. Email the lab report and your order number to michael@prymalab.net.
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