What Is Semax?
A synthetic heptapeptide analog of ACTH(4-10), studied in neuroprotection and cognitive-function research models. Structure, identifiers and what the literature measures.
Identity
Semax is a heptapeptide built from the ACTH(4-7) fragment with a Pro-Gly-Pro tail added. That tail is the reason it is studied at all: it slows enzymatic degradation substantially while the molecule retains no corticotropic activity of its own.
| CAS number | 80714-61-0 |
|---|---|
| Molecular formula | C37H51N9O10S |
| Molecular weight | 813.9 g/mol |
| Sequence | Met-Glu-His-Phe-Pro-Gly-Pro |
| Parent fragment | ACTH(4-10) |
| Physical form | Lyophilized powder |
| Regulatory status | Not approved by the FDA for any use |
The CAS number is the reliable identifier. House codes and trade names vary between suppliers and sometimes collide outright, so when comparing material from different sources, compare the CAS number and molecular formula rather than the product name.
What the literature examines
Published work on this compound is preclinical — animal models and in-vitro systems. It is not an approved drug, and nothing below is a statement about what it does in a person.
- BDNF and TrkB expression in rodent brain tissue
- Neuroprotection endpoints in rodent ischaemia models
- Effects on the dopaminergic and serotonergic systems in animal models
- Peptide stability and degradation kinetics in plasma
We do not provide dosing, reconstitution, administration or protocol guidance for this or any compound, and we will not answer questions about using a product on a person or an animal. See our Research Use Only Policy.
Purity and verification
The practical questions for a researcher are whether the material is what it claims to be, and what fraction of the vial is that substance rather than related impurities, residual solvent or counterion salt.
Two measurements answer that. HPLC separates the sample and reports purity as a percentage of total peak area. Mass spectrometry confirms identity by measuring molecular weight against the expected 813.9 g/mol. A certificate of analysis reports both for a specific lot.
A certificate confirms what is in the vial. It is not evidence that the material is safe or suitable for any use outside a laboratory.
Handling and storage
- Supplied lyophilized and shelf-stable at ambient temperature for shipping; no cold-chain handling is required in transit.
- For longer-term storage keep the sealed vial cold, dry and out of direct light.
- Handle in a laboratory setting with appropriate protective equipment.
- Dispose of material according to your institution's procedures and local regulations.
General stability figures are on our Storage & Handling page.
Semax — 10mg
≥99% purity. Currently listed as coming soon.