Sable · Question
What is the difference between Ipamorelin and Melanotan I?
Ipamorelin is a pentapeptide ghrelin receptor agonist reported in 1998 as a selective growth hormone secretagogue in endocrine research (peptide, MW about 711.9 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between Ipamorelin and Melanotan I?
Ipamorelin is a pentapeptide ghrelin receptor agonist reported in 1998 as a selective growth hormone secretagogue in endocrine research (peptide, MW about 711.9 g/mol).
Which is heavier, Ipamorelin or Melanotan I?
Ipamorelin has a molecular weight of about 711.9 g/mol and Melanotan I about 1646.8 g/mol (PubChem), so Melanotan I is heavier by 934.9 g/mol, a ratio of 2.31. This means 1 mg of Ipamorelin contains 1,404.7 nmol versus 607.2 nmol for Melanotan I.
How many mg of Melanotan I are equimolar to 1 mg of Ipamorelin?
1 mg of Ipamorelin (MW 711.9) is 1,404.7 nmol. The same number of moles of Melanotan I (MW 1646.8) weighs 2.313 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Ipamorelin and Melanotan I
PubChem lists Ipamorelin as C38H49N9O5 (711.9 g/mol) and Melanotan I as C78H111N21O19 (1646.8 g/mol). Ipamorelin is a peptide; Melanotan I is a peptide. These formulas refer to the parent compounds without salt counter-ions.
What is the difference between Ipamorelin and Melanotan II?
Ipamorelin is a pentapeptide ghrelin receptor agonist reported in 1998 as a selective growth hormone secretagogue in endocrine research (peptide, MW about 711.9 g/mol).
Which is heavier, Ipamorelin or Melanotan II?
Ipamorelin has a molecular weight of about 711.9 g/mol and Melanotan II about 1024.2 g/mol (PubChem), so Melanotan II is heavier by 312.3 g/mol, a ratio of 1.44. This means 1 mg of Ipamorelin contains 1,404.7 nmol versus 976.4 nmol for Melanotan II.
How many mg of Melanotan II are equimolar to 1 mg of Ipamorelin?
1 mg of Ipamorelin (MW 711.9) is 1,404.7 nmol. The same number of moles of Melanotan II (MW 1024.2) weighs 1.439 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Ipamorelin and Melanotan II
PubChem lists Ipamorelin as C38H49N9O5 (711.9 g/mol) and Melanotan II as C50H69N15O9 (1024.2 g/mol). Ipamorelin is a peptide; Melanotan II is a cyclic peptide. These formulas refer to the parent compounds without salt counter-ions.
A 2 mg vial of Ipamorelin equals how many mg of Melanotan I in moles?
2 mg of Ipamorelin (MW 711.9) is 2.809 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 4.626 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 2 mg vial of Ipamorelin equals how many mg of Melanotan II in moles?
2 mg of Ipamorelin (MW 711.9) is 2.809 µmol. The same amount of Melanotan II (MW 1024.2) would weigh 2.877 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Ipamorelin equals how many mg of Melanotan I in moles?
10 mg of Ipamorelin (MW 711.9) is 14.047 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 23.132 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Ipamorelin equals how many mg of Melanotan II in moles?
10 mg of Ipamorelin (MW 711.9) is 14.047 µmol. The same amount of Melanotan II (MW 1024.2) would weigh 14.387 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Ipamorelin equals how many mg of Melanotan I in moles?
5 mg of Ipamorelin (MW 711.9) is 7.023 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 11.566 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Ipamorelin equals how many mg of Melanotan II in moles?
5 mg of Ipamorelin (MW 711.9) is 7.023 µmol. The same amount of Melanotan II (MW 1024.2) would weigh 7.193 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 Ipamorelin in moles?
5 mg of Melanotan I (MW 1646.8) is 3.036 µmol. The same amount of Ipamorelin (MW 711.9) would weigh 2.161 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 Ipamorelin in moles?
10 mg of Melanotan I (MW 1646.8) is 6.072 µmol. The same amount of Ipamorelin (MW 711.9) would weigh 4.323 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
More questions about ipamorelin
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 Ipamorelin and Melanotan I?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/ipamorelin-vs-melanotan-i/#sqa-039525
APA
Sable Peptides. (2026, October 11). *What is the difference between Ipamorelin and Melanotan I?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/ipamorelin-vs-melanotan-i/#sqa-039525
BibTeX
@misc{sable_#sqa-039525_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Ipamorelin and Melanotan I?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/ipamorelin-vs-melanotan-i/#sqa-039525}},
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