Sable · Question
What is the difference between Melanotan I and Tesamorelin?
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 Tesamorelin?
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 Tesamorelin?
Melanotan I has a molecular weight of about 1646.8 g/mol and Tesamorelin about 5136 g/mol (PubChem), so Tesamorelin is heavier by 3,489.2 g/mol, a ratio of 3.12. This means 1 mg of Melanotan I contains 607.2 nmol versus 194.7 nmol for Tesamorelin.
How many mg of Tesamorelin 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 Tesamorelin (MW 5136) weighs 3.119 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Melanotan I and Tesamorelin
PubChem lists Melanotan I as C78H111N21O19 (1646.8 g/mol) and Tesamorelin as C221H366N72O67S (5136 g/mol). Melanotan I is a peptide; Tesamorelin is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 5 mg vial of Melanotan I equals how many mg of Tesamorelin in moles?
5 mg of Melanotan I (MW 1646.8) is 3.036 µmol. The same amount of Tesamorelin (MW 5136) would weigh 15.594 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 Tesamorelin in moles?
10 mg of Melanotan I (MW 1646.8) is 6.072 µmol. The same amount of Tesamorelin (MW 5136) would weigh 31.188 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 2 mg vial of Tesamorelin equals how many mg of Melanotan I in moles?
2 mg of Tesamorelin (MW 5136) is 0.3894 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 0.6413 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Tesamorelin equals how many mg of Melanotan I in moles?
10 mg of Tesamorelin (MW 5136) is 1.947 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 3.206 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Tesamorelin equals how many mg of Melanotan I in moles?
5 mg of Tesamorelin (MW 5136) is 0.9735 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 1.603 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 20 mg vial of Tesamorelin equals how many mg of Melanotan I in moles?
20 mg of Tesamorelin (MW 5136) is 3.894 µmol. The same amount of Melanotan I (MW 1646.8) would weigh 6.413 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 Tesamorelin?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/melanotan-i-vs-tesamorelin/#sqa-040104
APA
Sable Peptides. (2026, October 11). *What is the difference between Melanotan I and Tesamorelin?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/melanotan-i-vs-tesamorelin/#sqa-040104
BibTeX
@misc{sable_#sqa-040104_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Melanotan I and Tesamorelin?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/melanotan-i-vs-tesamorelin/#sqa-040104}},
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