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-26-00088
Key
VPT8RKHJ
Verify at prymalab.net/testing/verify/
Selank 5 mg Lot PL-2609-088 · analysed September 19, 2026 · issued October 3, 2026
Purity · RP-HPLC99.72%Specification 99.0% • main peak at 2.48 min
Identity · Observed Mass752.8 DaTheoretical 751.9 Da • +0.9 Da (1197 ppm)
ConclusionPASSMeets every specification for the tests performed
The certificate
Summary
| Compound | Selank Tuftsin-Pro-Gly-Pro heptapeptide (TKPRPGP) |
|---|---|
| CAS number | 129954-34-3 |
| Molecular formula | C33H57N11O9 |
| Theoretical mass | 751.9 Da |
| Sequence / structure | H-TKPRPGP-OH (7 residues; free N- and C-termini) |
| Appearance | White lyophilized powder |
| Storage | −20 °C, desiccated, dark |
| Label claim | 5 mg/vial |
| Lot number | PL-2609-088 |
| Certificate number | PL-26-00088 |
| Date of analysis | 2026-09-19 (retest 2028-09-18) |
| Purity (RP-HPLC) | 99.72% |
| Identity (LC-MS) | 752.8 Da |
| Water content (KF) | 1.6% |
| Endotoxin (LAL) | 0.04 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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