Home Research library Ipamorelin vs Sermorelin
Comparison
Ipamorelin vs Sermorelin
Ipamorelin and Sermorelin are separate research compounds. This page sets what our catalogue and the laboratory certificates state about each one side by side: identifiers, formula, molecular weight, chain length, form and storage. It describes the materials, not what they do, and carries no use guidance.
Specification, side by side
| Ipamorelin | Sermorelin | |
|---|---|---|
| Also known as | None listed | GRF (1-29) |
| Catalogue shelf | Hormones | Hormones |
| CAS number | 170851-70-4 | 86168-78-7 |
| Molecular formula | C38H49N9O5 | C149H246N44O42S |
| Molecular weight | 711.9 g/mol | 3,357.9 g/mol |
| Chain length | 5 residues | 29 residues |
| Form as supplied | Lyophilized powder | Lyophilized powder |
| Storage | -20 °C, desiccated | -20 °C, desiccated |
| Sizes stocked | 5 mg, 10 mg | 5 mg |
| Current certificates | 5 mg: 99.78%, lot IPA5-080310 mg: 99.78%, lot IPA10-0803 | 5 mg: 99.8%, lot SERMO5-0318 |
| PubChem record | CID 9831659 | CID 16132413 |
Figures are the ones printed on each product page. Purity appears only where a current laboratory certificate supports it, and links to that certificate.
What differs
- Chain length: Ipamorelin has 5 residues and Sermorelin has 29 residues.
- Molecular weight: Ipamorelin is 711.9 g/mol and Sermorelin is 3,357.9 g/mol. Sermorelin is the largest of the two.
- Each has its own CAS registry number (Ipamorelin: 170851-70-4 and Sermorelin: 86168-78-7), which is how a chemical supplier tells them apart on paper.
- Their molecular formulas differ: C38H49N9O5 for Ipamorelin and C149H246N44O42S for Sermorelin.
What each one is
Ipamorelin
A pentapeptide agonist at the growth hormone secretagogue receptor. Notable in the literature for selectivity: it releases growth hormone in pituitary assays with far less effect on cortisol and prolactin than the earlier secretagogues, which makes it a cleaner tool for isolating the GHSR-1a pathway. See Ipamorelin.
Sermorelin
The first twenty-nine residues of growth hormone releasing hormone, which is the whole of its activity at the GHRH receptor. Used in pituitary somatotroph assays and as the reference agonist against which the longer-acting GHRH analogues are compared. See Sermorelin.
Common questions
Are Ipamorelin and Sermorelin the same compound?
No. They are separate compounds with separate CAS registry numbers: 170851-70-4 for Ipamorelin and 86168-78-7 for Sermorelin. They are sold as separate items and certified separately.
Which is the larger molecule, Ipamorelin or Sermorelin?
Sermorelin, at 3,357.9 g/mol. Ipamorelin is 711.9 g/mol.
Is there a certificate of analysis for Ipamorelin and Sermorelin?
Ipamorelin has 2 current certificates and Sermorelin has 1 current certificate in the testing library, each linked to the laboratory's own file.
Does this page say what Ipamorelin and Sermorelin are used for?
No. It compares the materials as chemicals: identifiers, formula, weight, chain length, form and storage. Everything here is sold for laboratory research use only, and the site publishes no use guidance.
Further reading
- Sermorelin, tesamorelin, ipamorelin and CJC-1295 comparedThree of these are GHRH analogues; ipamorelin is a five-residue ghrelin-receptor ligand. One had an approved product that was discontinued, one has an approved product on the market, two have none. Identity and status side by side.
Other comparisons
For laboratory research use only. Not a drug, not a supplement, not for human or veterinary use.