Sable · Question
What is the difference between Melanotan I and Oxytocin?
Melanotan I is a linear 13-residue alpha-MSH analogue used in melanocortin-1 receptor research (peptide, MW about 1646.8 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between Melanotan I and Oxytocin?
Melanotan I is a linear 13-residue alpha-MSH analogue used in melanocortin-1 receptor research (peptide, MW about 1646.8 g/mol).
Which is heavier, Melanotan I or Oxytocin?
Melanotan I has a molecular weight of about 1646.8 g/mol and Oxytocin about 1007.2 g/mol (PubChem), so Melanotan I is heavier by 639.6 g/mol, a ratio of 1.64. This means 1 mg of Melanotan I contains 607.2 nmol versus 992.9 nmol for Oxytocin.
How many mg of Oxytocin are equimolar to 1 mg of Melanotan I?
1 mg of Melanotan I (MW 1646.8) is 607.2 nmol. The same number of moles of Oxytocin (MW 1007.2) weighs 0.6116 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Melanotan I and Oxytocin
PubChem lists Melanotan I as C78H111N21O19 (1646.8 g/mol) and Oxytocin as C43H66N12O12S2 (1007.2 g/mol). Melanotan I is a peptide; Oxytocin is a cyclic nonapeptide. These formulas refer to the parent compounds without salt counter-ions.
A 5 mg vial of Melanotan I equals how many mg of Oxytocin in moles?
5 mg of Melanotan I (MW 1646.8) is 3.036 µmol. The same amount of Oxytocin (MW 1007.2) would weigh 3.058 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 Oxytocin in moles?
10 mg of Melanotan I (MW 1646.8) is 6.072 µmol. The same amount of Oxytocin (MW 1007.2) would weigh 6.116 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 2 mg vial of Oxytocin equals how many mg of Melanotan I in moles?
2 mg of Oxytocin (MW 1007.2) is 1.986 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 3.27 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Oxytocin equals how many mg of Melanotan I in moles?
5 mg of Oxytocin (MW 1007.2) is 4.964 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 8.175 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
More questions about melanotan-i
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 Melanotan I and Oxytocin?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/melanotan-i-vs-oxytocin/#sqa-040072
APA
Sable Peptides. (2026, October 11). *What is the difference between Melanotan I and Oxytocin?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/melanotan-i-vs-oxytocin/#sqa-040072
BibTeX
@misc{sable_#sqa-040072_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Melanotan I and Oxytocin?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/melanotan-i-vs-oxytocin/#sqa-040072}},
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