Research use only — not for human consumption Batch 24-B released 14.07.26 · UK & EU dispatch within 24h
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Catalogue / Cognitive / Semax
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In stock UK dispatch 24h Batch 24-B

Semax

ACTH (4-10) analogue · 813.9 g/mol · CAS 80714-61-0
Buy Semax in the UK — a synthetic heptapeptide analogue of ACTH (4-10) supplied lyophilised for laboratory neuroscience research with batch COA.
98.7%
HPLC purity
813.9
g/mol
Pass
Mass spec ID
Vial size
Open dosing calculator →

What is Semax?

Semax is a synthetic heptapeptide derived from the ACTH (4-10) fragment with a C-terminal Pro-Gly-Pro extension that confers enzymatic stability. It is used in neurotrophic and BDNF-pathway research.

Supplied lyophilised, highly hygroscopic. Protect from moisture.

Semax reconstitution reference

Reconstitute with bacteriostatic water. The table shows the concentration and syringe volume produced by common dilutions of a 10mg vial, for reference when preparing research stock solutions.

Bac water addedConcentration300 mcg =600 mcg =
1 ml10 mg/ml3 units6 units
2 ml5 mg/ml6 units12 units
3 ml3.33 mg/ml9 units18 units
5 ml2 mg/ml15 units30 units
Units measured on a standard U-100 insulin syringe (100 units = 1 ml). For other vial sizes use the peptide reconstitution calculator.

Storage & handling

Before reconstitution
Store lyophilised at −20 °C, protected from light. Stable for 24 months or longer in the sealed vial.
After reconstitution
Store at 2–8 °C and use within 28 days. Avoid repeated freeze-thaw cycles; aliquot where possible.

Frequently asked questions

Is Semax third-party tested?

Yes. Every batch is tested by an independent laboratory for HPLC purity and mass-spectrometry identity. The certificate for the batch you receive is linked on this page before you buy — no account needed.

How should I reconstitute Semax?

Add bacteriostatic water slowly down the inside wall of the vial, aimed away from the powder, then swirl gently until clear. Never shake. Use the reconstitution calculator to work out the volume for your target concentration.

How long does Semax last once reconstituted?

Refrigerated at 2–8 °C and protected from light, a reconstituted vial is generally used within 28 days. Unopened lyophilised powder stored at −20 °C is stable far longer.

How quickly does it ship?

Orders placed before 3pm on a working day are dispatched the same day by Royal Mail 24h tracked. EU orders go by DPD, typically 3–5 working days.

Specification
CAS80714-61-0
SynonymMet-Glu-His-Phe-Pro-Gly-Pro
Mol. weight813.9 g/mol
Residues7 amino acids
FormLyophilised powder
SolventBacteriostatic water
FormLyophilised powder, sterile vial
Storage−20 °C, protect from light
Reconstitution2 mL bacteriostatic water
Stability28 days at 2–8 °C reconstituted
ShippingUK 24h tracked · EU 3–5 days
Research guides
How to reconstitute a lyophilised peptideHow to store research peptidesHow to read a certificate of analysisBacteriostatic water vs sterile waterAre research peptides legal in the UK?
Supplied strictly as a laboratory reference material for in-vitro research. Not a medicine, food or cosmetic. Not for human or veterinary consumption, diagnostic or therapeutic use.