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Semax

Semax

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Semax is a synthetic heptapeptide derived from the 4-10 fragment of adrenocorticotropic hormone (ACTH), with an added Pro-Gly-Pro tripeptide tail for improved stability. It was first described in the late 1980s. The molecule has the sequence Met-Glu-His-Phe-Pro-Gly-Pro, a molecular weight of approximately 826.92 g/mol, and the molecular formula C38H54N12O9. It dissolves readily in water and is supplied as a lyophilized powder. The Pro-Gly-Pro tail is a structural feature designed to resist breakdown by prolyl endopeptidases, giving Semax greater stability than the native ACTH fragment. CAS: 80714-61-0. This product is strictly for research purposes only.

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Certificate of Analysis

Independent laboratory testing confirms purity and composition of this research peptide.

+ ENDO PASSED
99.99%
Purity
A1027
Batch
June 2026
Date
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Overview

Semax is a synthetic heptapeptide — a chain of seven amino acids — with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. It was first described in the late 1980s. Structurally, Semax is derived from a fragment of adrenocorticotropic hormone (ACTH), specifically the 4-10 segment, with an added Pro-Gly-Pro tripeptide tail that increases resistance to enzymatic degradation compared to the unmodified ACTH fragment.

The compound has a molecular formula of C37H51N9O10S (free acid form) and a molar mass of approximately 813.93 g/mol (826.92 g/mol as the acetate salt commonly supplied). It is water-soluble and supplied as a white to off-white lyophilized powder. Its CAS registry number is 80714-61-0. The Pro-Gly-Pro extension is a known structural motif used in peptide chemistry to resist cleavage by prolyl endopeptidases, distinguishing it structurally from the native ACTH(4-10) fragment.

This product is strictly for research purposes only. Not approved for human or animal use.

PubChem Reference: View compound profile on NIH PubChem

Key Characteristics

MOLECULAR PROFILE

Formula: C38H54N12O9

Molar Mass: 826.92 g/mol

CAS: 80714-61-0

Sequence: Met-Glu-His-Phe-Pro-Gly-Pro

PHYSICAL PROPERTIES

Form: White to off-white lyophilized powder

Solubility: Water-soluble

Storage: Requires refrigeration after reconstitution

Stability: Stable in lyophilized form

Size: 10mg, 5mg

SKU: AXIOM-SEMAX

Categories: Single Peptides

Tags: Research Chemical

This product is strictly for research purposes only. Not for human or animal consumption.

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The statements on this website have not been evaluated by the U.S. Food and Drug Administration. The products and information provided by Axiom Research are not intended to diagnose, treat, cure, or prevent any disease. Axiom Research is a research chemical supplier. We are not a compounding pharmacy or compounding facility as defined under Section 503A of the Federal Food, Drug, and Cosmetic Act, nor are we an outsourcing facility as defined under Section 503B.

All products are sold for research, laboratory, or analytical purposes only, and are not for human consumption.

Semax — Axiom Research