Sable · Question
What is the difference between PT-141 and Tirzepatide?
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).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between PT-141 and Tirzepatide?
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 Tirzepatide?
PT-141 has a molecular weight of about 1025.2 g/mol and Tirzepatide about 4813 g/mol (PubChem), so Tirzepatide is heavier by 3,787.8 g/mol, a ratio of 4.69. This means 1 mg of PT-141 contains 975.4 nmol versus 207.8 nmol for Tirzepatide.
How many mg of Tirzepatide 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 Tirzepatide (MW 4813) weighs 4.695 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of PT-141 and Tirzepatide
PubChem lists PT-141 as C50H68N14O10 (1025.2 g/mol) and Tirzepatide as C225H348N48O68 (4813 g/mol). PT-141 is a cyclic peptide; Tirzepatide 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 Tirzepatide in moles?
10 mg of PT-141 (MW 1025.2) is 9.754 µmol. The same amount of Tirzepatide (MW 4813) would weigh 46.947 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 Tirzepatide in moles?
5 mg of PT-141 (MW 1025.2) is 4.877 µmol. The same amount of Tirzepatide (MW 4813) would weigh 23.473 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 20 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
20 mg of Tirzepatide (MW 4813) is 4.155 µmol. The same amount of PT-141 (MW 1025.2) would weigh 4.26 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
10 mg of Tirzepatide (MW 4813) is 2.078 µmol. The same amount of PT-141 (MW 1025.2) would weigh 2.13 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
5 mg of Tirzepatide (MW 4813) is 1.039 µmol. The same amount of PT-141 (MW 1025.2) would weigh 1.065 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 30 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
30 mg of Tirzepatide (MW 4813) is 6.233 µmol. The same amount of PT-141 (MW 1025.2) would weigh 6.39 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 40 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
40 mg of Tirzepatide (MW 4813) is 8.311 µmol. The same amount of PT-141 (MW 1025.2) would weigh 8.52 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 15 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
15 mg of Tirzepatide (MW 4813) is 3.117 µmol. The same amount of PT-141 (MW 1025.2) would weigh 3.195 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 60 mg vial of Tirzepatide equals how many mg of PT-141 in moles?
60 mg of Tirzepatide (MW 4813) is 12.466 µmol. The same amount of PT-141 (MW 1025.2) would weigh 12.78 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 Tirzepatide?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-tirzepatide/#sqa-040468
APA
Sable Peptides. (2026, October 11). *What is the difference between PT-141 and Tirzepatide?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-tirzepatide/#sqa-040468
BibTeX
@misc{sable_#sqa-040468_2026,
author = {{Sable Peptides}},
title = {{What is the difference between PT-141 and Tirzepatide?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-tirzepatide/#sqa-040468}},
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