Selank for Sale: 5 mg Research Vial Price, COA and What You Are Buying
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Research use only. Peptides supplied by Peptryn are sold strictly for in vitro and preclinical laboratory research. They are not approved by the FDA for human or veterinary use, and nothing here is medical advice, a dosing recommendation, or an instruction for self-administration. This page explains what Peptryn’s selank listing includes and how to check any selank vial.
Quick answer: Peptryn sells selank as a 5 mg lyophilized research vial for $34.99, which is $7.00 per mg. The certificate for lot 2026-10-13 reports 99.87% purity by HPLC-UV-MS with identity confirmed, tested by MZ Biolabs, and links to the lab’s own report. Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro, 751.9 Da). The vial is a laboratory powder, not a nasal spray and not a product for people. Peptryn sells it only for laboratory research to buyers who are 21 or older.
This page covers the buying side: the price, what the certificate shows and leaves out, and the checks that matter for selank. For the molecule and its history, read our selank guide.
Key takeaways
- The 5 mg vial is $34.99 ($7.00 per mg) and ships free on orders over $150, dispatched the same day from the USA.
- Lot 2026-10-13 reads 99.87% HPLC-UV-MS purity with identity confirmed by the lab.
- The certificate covers purity and identity. It does not list an endotoxin result, and this lot is newer than our September data report, so there is no measured-quantity figure yet.
- The expected mass is 751.9 Da (C33H57N11O9).
Last verified November 12, 2026. Prices and lot details are as listed on that date and change with each batch, so check the product page and certificate before you rely on a number. Sources are listed at the end. For laboratory and research use only. Nothing here is medical or legal advice.
What Peptryn’s selank vial includes
| Item | Detail |
|---|---|
| Compound | Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) |
| Form and size | Lyophilized powder, 5 mg |
| Listed price | $34.99 ($7.00 per mg) |
| Lot | 2026-10-13 |
| Purity (HPLC-UV-MS) | 99.87% |
| Identity | Confirmed by the lab |
| Endotoxin and measured quantity | Not on this certificate |
| Molecular weight | 751.9 Da |
| Formula and CAS | C33H57N11O9, 129954-34-3 |
| Storage | Lyophilized powder at -20 ยฐC, protected from light and repeated freeze-thaw cycles |
| Shipping | Free over $150, same-day dispatch from the USA |
What a selank search returns, and what Peptryn sells
Search results for selank mix laboratory suppliers with prescriber-review pages and nasal-spray products. Those are different things from a research vial. Peptryn’s listing is a 5 mg lyophilized powder for laboratory work. If a page offers selank as a monthly plan, a spray, or anything that comes with a prescriber review, it is selling a different kind of product.
Selank is a synthetic heptapeptide built from the tuftsin sequence Thr-Lys-Pro-Arg with a Pro-Gly-Pro extension. Our selank guide covers its Russian origin and regulatory status. The FDA has not approved selank for any use.
Five checks before you buy any selank vial
- Match the lot. Compare the lot on your vial with the lot on the report. Peptryn’s current selank lot is 2026-10-13, a newer batch than most of the catalog. Without a matching lot, a certificate describes some other batch.
- Check the mass. Selank is 751.9 Da. The lab report should show a mass in that region. A report that prints only a purity percentage does not confirm the compound.
- Read purity as what it is. HPLC purity is the main peak’s area against everything detected. At 99.87% little else registered. The figure does not give the amount in the vial. See our guide to peptide purity.
- Know what the certificate leaves out. This certificate covers HPLC purity and identity. It does not include an endotoxin result or a measured quantity per vial. When you compare sellers, ask each one for those two lines.
- Open the lab’s own record. The Selank 5mg certificate links to the MZ Biolabs purity and identity report for the lot and carries a QR code to the same place. A seller-hosted PDF alone gives you nothing independent to open.
Price per milligram and what to compare
At $34.99 for 5 mg, selank comes to $7.00 per mg. Compare it only with listings of selank in the same size that come with a lot-matched report. Other analogues are different compounds.
Free shipping starts at $150. Peptryn does not say it is the cheapest, and prices change with each lot, so do the division yourself for every seller.
Ordering from Peptryn
The selank 5 mg vial has its own product page, with the certificate linked from the testing section. Orders ship from the USA with same-day dispatch to buyers who are 21 or older and who confirm qualified research use. The vial is a lab powder with no prescribing information.
Frequently asked questions
Where can I buy selank for research?
Peptryn sells selank as a 5 mg lyophilized research peptide on its selank product page. It is sold only for laboratory research, to buyers who are 21 or older and who confirm qualified research use.
How much does selank cost?
Peptryn lists the 5 mg vial at $34.99, which is $7.00 per mg, and ships free over $150. Prices change, so check the product page.
Is Peptryn’s selank a nasal spray?
No. It is a lyophilized powder in a 5 mg vial, sold for laboratory research only.
Is Peptryn’s selank third-party tested?
Yes. MZ Biolabs tested lot 2026-10-13 and reports 99.87% HPLC-UV-MS purity with identity confirmed. The report is on the lab’s site, and Peptryn is the client that ordered it.
Is selank FDA approved?
No. The FDA has not approved selank for any use. Peptryn supplies it as a laboratory research material only.
What is the molecular weight of selank?
751.9 Da. The formula is C33H57N11O9 and the CAS number is 129954-34-3.
Sources and related pages
- Peptryn selank product page
- selank certificate of analysis (Peptryn)
- MZ Biolabs report (hosted by the testing laboratory)
- Peptide COA Data Report, Q3 2026 (September 26, 2026)
- COA Library, how to read a certificate of analysis, third-party tested peptides
- Selank guide
Peptryn products are sold for laboratory research use only, to buyers who are 21 or older. The information on this page has not been evaluated by the U.S. Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease.
