Sable · Question
What is the difference between GHRP-2 and Melanotan I?
GHRP-2 is a synthetic growth hormone secretagogue hexapeptide studied as a ghrelin receptor (GHS-R1a) agonist in endocrine research (peptide, MW about 818 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between GHRP-2 and Melanotan I?
GHRP-2 is a synthetic growth hormone secretagogue hexapeptide studied as a ghrelin receptor (GHS-R1a) agonist in endocrine research (peptide, MW about 818 g/mol).
Which is heavier, GHRP-2 or Melanotan I?
GHRP-2 has a molecular weight of about 818 g/mol and Melanotan I about 1646.8 g/mol (PubChem), so Melanotan I is heavier by 828.8 g/mol, a ratio of 2.01. This means 1 mg of GHRP-2 contains 1,222.5 nmol versus 607.2 nmol for Melanotan I.
How many mg of Melanotan I are equimolar to 1 mg of GHRP-2?
1 mg of GHRP-2 (MW 818) is 1,222.5 nmol. The same number of moles of Melanotan I (MW 1646.8) weighs 2.013 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of GHRP-2 and Melanotan I
PubChem lists GHRP-2 as C45H55N9O6 (818 g/mol) and Melanotan I as C78H111N21O19 (1646.8 g/mol). GHRP-2 is a peptide; Melanotan I is a peptide. These formulas refer to the parent compounds without salt counter-ions.
What is the difference between GHRP-2 and Melanotan II?
GHRP-2 is a synthetic growth hormone secretagogue hexapeptide studied as a ghrelin receptor (GHS-R1a) agonist in endocrine research (peptide, MW about 818 g/mol).
Which is heavier, GHRP-2 or Melanotan II?
GHRP-2 has a molecular weight of about 818 g/mol and Melanotan II about 1024.2 g/mol (PubChem), so Melanotan II is heavier by 206.2 g/mol, a ratio of 1.25. This means 1 mg of GHRP-2 contains 1,222.5 nmol versus 976.4 nmol for Melanotan II.
How many mg of Melanotan II are equimolar to 1 mg of GHRP-2?
1 mg of GHRP-2 (MW 818) is 1,222.5 nmol. The same number of moles of Melanotan II (MW 1024.2) weighs 1.252 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of GHRP-2 and Melanotan II
PubChem lists GHRP-2 as C45H55N9O6 (818 g/mol) and Melanotan II as C50H69N15O9 (1024.2 g/mol). GHRP-2 is a peptide; Melanotan II is a cyclic peptide. These formulas refer to the parent compounds without salt counter-ions.
A 5 mg vial of GHRP-2 equals how many mg of Melanotan I in moles?
5 mg of GHRP-2 (MW 818) is 6.112 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 10.066 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of GHRP-2 equals how many mg of Melanotan II in moles?
5 mg of GHRP-2 (MW 818) is 6.112 µmol. The same amount of Melanotan II (MW 1024.2) would weigh 6.26 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of GHRP-2 equals how many mg of Melanotan I in moles?
10 mg of GHRP-2 (MW 818) is 12.225 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 20.132 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of GHRP-2 equals how many mg of Melanotan II in moles?
10 mg of GHRP-2 (MW 818) is 12.225 µmol. The same amount of Melanotan II (MW 1024.2) would weigh 12.521 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Melanotan I equals how many mg of GHRP-2 in moles?
5 mg of Melanotan I (MW 1646.8) is 3.036 µmol. The same amount of GHRP-2 (MW 818) would weigh 2.484 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Melanotan I equals how many mg of GHRP-2 in moles?
10 mg of Melanotan I (MW 1646.8) is 6.072 µmol. The same amount of GHRP-2 (MW 818) would weigh 4.967 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A CoA for every lot; each vial carries a printed lot number that matches it. Ask with the lot number and we send it.
Cite this
Research use only. Not for consumption. No health claims.
Plain
Sable Peptides. (2026). What is the difference between GHRP-2 and Melanotan I?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/ghrp-2-vs-melanotan-i/#sqa-039025
APA
Sable Peptides. (2026, October 11). *What is the difference between GHRP-2 and Melanotan I?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/ghrp-2-vs-melanotan-i/#sqa-039025
BibTeX
@misc{sable_#sqa-039025_2026,
author = {{Sable Peptides}},
title = {{What is the difference between GHRP-2 and Melanotan I?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/ghrp-2-vs-melanotan-i/#sqa-039025}},
note = {Accessed 11 October 2026. CC BY 4.0}
}Badge
<a href="https://www.sablepeptides.co.uk/ref"><img src="https://www.sablepeptides.co.uk/badge/ref.svg" alt="Data: UK Research Peptide Reference — Sable Peptides" width="220" height="40"></a>
Date modified: 2026-10-10