For laboratory research use only. Not for human consumption. Not for clinical or therapeutic use. Not evaluated by the FDA.
Research Comparison
GHRP-2 vs GHRP-6
GHRP-2 and GHRP-6 are both synthetic hexapeptides that contain D-amino acids and end in a C-terminal amide. They differ in sequence and composition: GHRP-6 is His-D-Trp-Ala-Trp-D-Phe-Lys-NH₂ (C46H56N12O6, 873.0 g/mol), while GHRP-2 is C45H55N9O6 at 818.0 g/mol. Both are supplied as lyophilized powder.
| Attribute | GHRP-2 | GHRP-6 |
|---|---|---|
| Peptide class / structure | Synthetic hexapeptide containing D-amino acids; C-terminal amide | Synthetic hexapeptide: His-D-Trp-Ala-Trp-D-Phe-Lys-NH₂ |
| Receptor class (binding assays) | GH secretagogue receptor (GHSR-1a) | GH secretagogue receptor (GHSR-1a) |
| Length (residues) | 6 aa | 6 aa |
| Molecular formula | C45H55N9O6 | C46H56N12O6 |
| Molecular weight | 818.0 g/mol | 873.0 g/mol |
| CAS number | 158861-67-7 | 87616-84-0 |
| Supplied as | Lyophilized powder, 10 mg vial | Lyophilized powder, 10 mg vial |
| COA on file | Not yet | Not yet |
Frequently Asked Questions
How do GHRP-2 and GHRP-6 differ chemically?+
Both are six-residue synthetic peptides with D-amino acids and a C-terminal amide, but their sequences differ. GHRP-6 is His-D-Trp-Ala-Trp-D-Phe-Lys-NH₂ (C46H56N12O6, CAS 87616-84-0); GHRP-2 is C45H55N9O6 (CAS 158861-67-7). GHRP-6 carries three more nitrogen atoms than GHRP-2.
How do their molecular weights compare?+
GHRP-2 is 818.0 g/mol and GHRP-6 is 873.0 g/mol. These are free-base values; peptides like these are commonly supplied as acetate or TFA salts, which weigh more, so the exact species and net peptide content of a lot belong on its Certificate of Analysis.
Are both supplied lyophilized?+
Yes — both are supplied as lyophilized powder. Store unopened vials at −20 °C for the long term (2–8 °C short term), protected from light and moisture, and avoid repeated freeze–thaw once in solution.