Sable · Question
What is the difference between Ipamorelin and PT-141?
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 PT-141?
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 PT-141?
Ipamorelin has a molecular weight of about 711.9 g/mol and PT-141 about 1025.2 g/mol (PubChem), so PT-141 is heavier by 313.3 g/mol, a ratio of 1.44. This means 1 mg of Ipamorelin contains 1,404.7 nmol versus 975.4 nmol for PT-141.
How many mg of PT-141 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 PT-141 (MW 1025.2) weighs 1.44 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Ipamorelin and PT-141
PubChem lists Ipamorelin as C38H49N9O5 (711.9 g/mol) and PT-141 as C50H68N14O10 (1025.2 g/mol). Ipamorelin is a peptide; PT-141 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 PT-141 in moles?
2 mg of Ipamorelin (MW 711.9) is 2.809 µmol. The same amount of PT-141 (MW 1025.2) would weigh 2.88 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 PT-141 in moles?
10 mg of Ipamorelin (MW 711.9) is 14.047 µmol. The same amount of PT-141 (MW 1025.2) would weigh 14.401 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 PT-141 in moles?
5 mg of Ipamorelin (MW 711.9) is 7.023 µmol. The same amount of PT-141 (MW 1025.2) would weigh 7.2 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of PT-141 equals how many mg of Ipamorelin in moles?
10 mg of PT-141 (MW 1025.2) is 9.754 µmol. The same amount of Ipamorelin (MW 711.9) would weigh 6.944 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 Ipamorelin in moles?
5 mg of PT-141 (MW 1025.2) is 4.877 µmol. The same amount of Ipamorelin (MW 711.9) would weigh 3.472 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 PT-141?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/ipamorelin-vs-pt-141/#sqa-039541
APA
Sable Peptides. (2026, October 11). *What is the difference between Ipamorelin and PT-141?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/ipamorelin-vs-pt-141/#sqa-039541
BibTeX
@misc{sable_#sqa-039541_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Ipamorelin and PT-141?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/ipamorelin-vs-pt-141/#sqa-039541}},
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