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A 10 mg Semax vial with a white nordpeps label
SX-01

Semax 10-vial kit

from €339

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ACTH(4-10) analogueNeuropeptide research

Semax

Peptide built on ACTH(4–10) · kits of 10 or 30 vials

Synthetic peptide from an ACTH fragment

Semax is a synthetic peptide made from the 4–10 fragment of ACTH. It was developed in Russia and is used in neuropeptide and cognition research.

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Certificates Per batch
Kit 10 or 30 vials
Dispatch 24–48 h

Research use only: laboratory and in-vitro work. Not for use in people or animals, and not for diagnostics.

Datasheet · Semax

Semax

Peptide built on ACTH(4–10) · kits of 10 or 30 vials

Out of stock

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Category
Cognitive
Vial sizes
10 mg
Sold as
10 or 30 vials
Vial size
Kit size
Semax: price per vial and per kit
SizePer vial10-vial kit30-vial kit
10 mg€33.90
€339


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Ships EU-wide from inside the EULeaves us in 24–48 hKits ship free10- or 30-vial kitsSealed freeze-dried vials
Certificate of Analysis
On request

Semax

Certificate for the current batch, emailed on request

About Semax

Semax is a seven-residue synthetic peptide based on the 4–10 section of adrenocorticotropic hormone (ACTH), modified to last longer. Researchers use it as a neuropeptide tool in cognition and neuroprotection work.

Semax comes in sealed kits of 10 or 30 freeze-dried vials. Certificates from an independent third-party laboratory are published per batch on /certificates as they become available. For laboratory and in-vitro research only.

Mechanism of action

Semax has seven residues: ACTH(4–10) with Pro-Gly-Pro added at the C-terminal end. That short tail matters. It slows breakdown by enzymes, so the molecule lasts long enough to study.

The ACTH fragment it uses lacks the part needed for corticotropic activity. So papers treat Semax as a neuropeptide, not a hormone analogue. Most reported effects concern BDNF and other neurotrophins.

A short summary of published work, given as research context. It makes no therapeutic claim.

What published studies show

A 2016 paper in the Journal of Inorganic Biochemistry looked at how acetylating the N-terminus changes the molecule. A 2020 study used functional connectomics on Semax and Selank together.

Semax comes from Russia, and most of its papers are in Russian or by Russian authors. Neither the EU nor the US has approved it.

Written for education from published papers. It promises no result to anyone who buys, and NordPeps sells Semax for laboratory research only.

Storage & handling

Unopened vials. Store at 2–8 °C. For long periods, −20 °C or colder. Room temperature is fine in transit, but it is not a way to store a peptide.

After reconstitution. Refrigerate at 2–8 °C. Do not freeze: ice crystals break the peptide down for good. In bacteriostatic water (0.9% benzyl alcohol), labs usually work through a vial within about 30 days. With plain sterile water, the window is 24–48 hours.

Keep vials closed and out of the light. If you hold frozen stock, thaw it as few times as you can; each cycle loses some activity.

Reconstitution calculator: concentration and draw volume →

Specifications

TypeSynthetic peptide built on ACTH(4–10)
Research areaCognitive & Mood
Vial options10 mg per vial
Supplied asKit of 10 or 30 freeze-dried vials
StateFreeze-dried powder, sterile-filtered
CAS80714-61-0
MW≈ 814 g/mol
FormulaC37H51N9O10S
Keep at2–8 °C; −20 °C for long-term
TestingIndependent third-party laboratory, one certificate per batch as it becomes available
CertificatesPublished per batch on /certificates when available
Semax certificatesCertificates, batch by batchCertificates from an independent third-party laboratory are published per batch on /certificates as they become available.Open the certificates page →

References & research

Peer-reviewed sources on PubMed, listed for background reading. Citing a paper is not a claim that NordPeps products do anything clinically.

  1. Semax, an ACTH(4–10) analogue: N-terminal acetylation, copper and zinc binding, biological properties (PubMed 27586814)
  2. Selank and Semax studied with a functional connectomic approach (PubMed 32342318)

Semax: common questions

How much does Semax cost?

A 10-vial kit costs €339 (10 mg). A 30-vial kit costs three times as much (€1,017). Delivery is free on every kit, to all 27 EU countries.

Is there a certificate for this compound?

Certificates from an independent third-party laboratory are published per batch on /certificates as they become available.

What kind of peptide is Semax?

A synthetic neuropeptide built on a fragment of ACTH, positions 4 to 10. NordPeps sells it for laboratory research only.

Why kits of 10 vials?

We sell this compound only in sealed kits of 10 identical vials, or 30. A 10-vial kit is the smallest order.

How do I store Semax?

Unopened: 2–8 °C; for long stretches, −20 °C. Reconstituted: in the fridge, never frozen. Details are under storage and handling.

How is the concentration set?

By the volume of bacteriostatic water you add, not by the vial size alone. Enter the vial size and the diluent volume in the reconstitution calculator and it gives you the concentration.

How do Semax and Selank compare?

Both were developed in Russia and both are made the same way: a short natural sequence plus a Pro-Gly-Pro tail for stability. Semax starts from ACTH(4–10). Selank starts from tuftsin.

Sealed kits, dispatched inside the EU.

Kits leave us 24–48 hours after payment, in a plain box with tracking. Delivery stays within the EU. Laboratory research use only.

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€339Out of stock