Selank COA & Specifications
Third-party certificate of analysis and chemical specifications for Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) research material in 5 mg and 10 mg lyophilized vials.
Last updated 27 September 2026
Specifications
| Material | Selank (heptapeptide) |
|---|---|
| CAS number | 129954-34-3 |
| Molecular formula | C33H57N11O9 |
| Molecular weight | 751.89 g/mol |
| Sequence | Thr-Lys-Pro-Arg-Pro-Gly-Pro |
| Physical form | Lyophilized powder |
| Vial sizes | 5 mg, 10 mg |
| Purity specification | ≥ 98% by HPLC |
| Storage | −20 °C, protected from light |
Certificates of analysis
Selank 10 mg — Batch 2026
| Laboratory | Janoshik Analytical |
|---|---|
| Task number | #151678 |
| Sample received / analyzed | 12 May 2026 / 19 May 2026 |
| Measured content | 10.22 mg (10 mg label) |
| Purity (HPLC) | 99.957% |
| Manufacturer on report | Wanshun Peptide Biotechnology Co., Ltd. |
Reading these results
- Measured content is the amount of Selank quantified in the vial: 10.22 mg against a 10 mg label.
- Purity (HPLC) is the main peak as a percentage of all detected material: 99.957%.
- The report was issued to the manufacturer (Wanshun Peptide Biotechnology) for batch 2026.
Verifying a certificate
Janoshik reports carry a unique key printed at the bottom of the certificate. Enter that key at janoshik.com/verify to view the original report on the laboratory’s own site and compare the task number, sample and results.
Frequently asked questions
What is the CAS number of Selank?
The CAS number for Selank is 129954-34-3.
What is the molecular weight of Selank?
Selank has the molecular formula C33H57N11O9 and a molecular weight of 751.89 g/mol.
What is the amino acid sequence of Selank?
Thr-Lys-Pro-Arg-Pro-Gly-Pro.
What purity is your Selank?
Our specification is 98% or higher by HPLC. The current certificate (Janoshik task #151678, analyzed 19 May 2026) reports 99.957%.
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