Comparison
Selank vs Semax: research peptide buyer comparison
Researchers often search "Selank vs Semax" and "Semax vs Selank" before they open a product page. This note compares identity data, vial formats, prices as listed on peptide.prof, and the 2026 HHS compounding context — without dosing or medical claims.
Both peptides are in the peptide.prof catalog as 10 mg lyophilized research vials.
Quick comparison table
| Field | Selank | Semax |
|---|---|---|
| CAS (PubChem) | 129954-34-3 (CID 11765600) | 80714-61-0 (CID 122108) |
| Sequence | Thr-Lys-Pro-Arg-Pro-Gly-Pro | Met-Glu-His-Phe-Pro-Gly-Pro |
| Form on peptide.prof | Lyophilized powder, 10 mg vial | Lyophilized powder, 10 mg vial |
| Listed from price | $60 per 1 pack | $75 per 1 pack |
| On HHS six-peptide 503A list (2026) | No | Yes |
| Intended use | Laboratory research only | Laboratory research only |
Live pack ladders and stock always sit on the product pages: Selank and Semax.
Identity: two different heptapeptides
Selank and Semax are not the same molecule. Selank is a synthetic analog built around the tuftsin fragment; Semax is an ACTH(4-10) analog. Matching CAS number and sequence on the seller's page to a public record (PubChem) is the first buyer check for either compound.
- Selank: CAS 129954-34-3, formula C33H57N11O9, MW 751.9 g/mol — see the Selank buyer checklist.
- Semax: CAS 80714-61-0 — see Semax HHS / LegitScript notes for the dated regulatory context.
What peptide.prof lists for each
Both listings are Made in USA lyophilized research vials sold by the pack, paid by Venmo or crypto, and shipped to a United States address after payment. Bacteriostatic water is a separate catalog line (3 mL and 10 mL sterile liquid), not bundled.
This site does not publish reconstitution, mixing, or administration instructions for either peptide.
HHS / FDA compounding context (2026)
Semax is one of six peptides named in the HHS interim 503A compounding enforcement-discretion policy (with BPC-157, Epitalon, KPV, MOTS-c, and TB-500). Selank is not on that appendix. That policy talks about compounding pharmacies under 503A — it does not turn a research-use catalog into a clinic supply list. For primary-source notes, start at the HHS compounding peptides hub and the compounded vs research peptides explainer.
How to choose which page to open first
- If you need the compound that is on the HHS six-peptide list, open Semax and read the dated learn posts.
- If you need Selank specifically (CAS 129954-34-3), open Selank and the buyer checklist.
- If you are comparing vendors, check CAS/sequence, vial strength in mg, pack price numbers, RUO labeling, and whether lot certificates are actually posted.
Ready to order for laboratory research? Pick the vial that matches the CAS you need. Research use only.
FAQ
- What is the difference between Selank and Semax for research buyers?
- Both are short research peptides sold as lyophilized vials. Semax is named in the 2026 HHS interim 503A compounding enforcement-discretion list; Selank is not. On peptide.prof, Selank is a 10 mg vial from $60 and Semax is a 10 mg vial from $75. Both are research use only.
- Does peptide.prof sell Selank and Semax?
- Yes. peptide.prof lists Selank 10 mg and Semax 10 mg lyophilized research vials with pack pricing. Made in USA. Research use only. Not for human or veterinary use.
- Is Selank on the HHS six-peptide list with Semax?
- No. The HHS interim 503A appendix names BPC-157, Epitalon, KPV, MOTS-c, Semax, and TB-500. Selank is not on that list. Compounding policy does not change how a research-use catalog sells laboratory material.
- Does this page give dosing for Selank or Semax?
- No. peptide.prof sells laboratory research material only. Not for human or veterinary use. This site does not publish dose, administration, or reconstitution instructions.
Research use only. Not for human or veterinary use. No dose or administration instructions on this site. Chemical identity references: PubChem CID 11765600 (Selank) and CID 122108 (Semax), checked November 4, 2026. Prices and stock: live product pages.