Sable · Question
What is the difference between PT-141 and Semaglutide?
PT-141 is a cyclic heptapeptide melanocortin receptor agonist, a metabolite-like analogue of Melanotan II with a C-terminal acid, used in melanocortin receptor research (cyclic peptide, MW about 1025.2 g/mol).
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Last verified 2026-10-10
What is the difference between PT-141 and Semaglutide?
PT-141 is a cyclic heptapeptide melanocortin receptor agonist, a metabolite-like analogue of Melanotan II with a C-terminal acid, used in melanocortin receptor research (cyclic peptide, MW about 1025.2 g/mol).
Which is heavier, PT-141 or Semaglutide?
PT-141 has a molecular weight of about 1025.2 g/mol and Semaglutide about 4114 g/mol (PubChem), so Semaglutide is heavier by 3,088.8 g/mol, a ratio of 4.01. This means 1 mg of PT-141 contains 975.4 nmol versus 243.1 nmol for Semaglutide.
How many mg of Semaglutide are equimolar to 1 mg of PT-141?
1 mg of PT-141 (MW 1025.2) is 975.4 nmol. The same number of moles of Semaglutide (MW 4114) weighs 4.013 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of PT-141 and Semaglutide
PubChem lists PT-141 as C50H68N14O10 (1025.2 g/mol) and Semaglutide as C187H291N45O59 (4114 g/mol). PT-141 is a cyclic peptide; Semaglutide is a peptide (lipidated). These formulas refer to the parent compounds without salt counter-ions.
A 10 mg vial of PT-141 equals how many mg of Semaglutide in moles?
10 mg of PT-141 (MW 1025.2) is 9.754 µmol. The same amount of Semaglutide (MW 4114) would weigh 40.129 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of PT-141 equals how many mg of Semaglutide in moles?
5 mg of PT-141 (MW 1025.2) is 4.877 µmol. The same amount of Semaglutide (MW 4114) would weigh 20.064 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 1 mg vial of Semaglutide equals how many mg of PT-141 in moles?
1 mg of Semaglutide (MW 4114) is 0.2431 µmol. The same amount of PT-141 (MW 1025.2) would weigh 0.2492 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 2 mg vial of Semaglutide equals how many mg of PT-141 in moles?
2 mg of Semaglutide (MW 4114) is 0.4861 µmol. The same amount of PT-141 (MW 1025.2) would weigh 0.4984 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 8 mg vial of Semaglutide equals how many mg of PT-141 in moles?
8 mg of Semaglutide (MW 4114) is 1.945 µmol. The same amount of PT-141 (MW 1025.2) would weigh 1.994 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Semaglutide equals how many mg of PT-141 in moles?
5 mg of Semaglutide (MW 4114) is 1.215 µmol. The same amount of PT-141 (MW 1025.2) would weigh 1.246 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Semaglutide equals how many mg of PT-141 in moles?
10 mg of Semaglutide (MW 4114) is 2.431 µmol. The same amount of PT-141 (MW 1025.2) would weigh 2.492 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 20 mg vial of Semaglutide equals how many mg of PT-141 in moles?
20 mg of Semaglutide (MW 4114) is 4.861 µmol. The same amount of PT-141 (MW 1025.2) would weigh 4.984 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 30 mg vial of Semaglutide equals how many mg of PT-141 in moles?
30 mg of Semaglutide (MW 4114) is 7.292 µmol. The same amount of PT-141 (MW 1025.2) would weigh 7.476 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 PT-141 and Semaglutide?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-semaglutide/#sqa-040448
APA
Sable Peptides. (2026, October 11). *What is the difference between PT-141 and Semaglutide?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-semaglutide/#sqa-040448
BibTeX
@misc{sable_#sqa-040448_2026,
author = {{Sable Peptides}},
title = {{What is the difference between PT-141 and Semaglutide?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-semaglutide/#sqa-040448}},
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