Sable · Question
What is the difference between PT-141 and SNAP-8?
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 SNAP-8?
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 SNAP-8?
PT-141 has a molecular weight of about 1025.2 g/mol and SNAP-8 about 1075.2 g/mol (PubChem), so SNAP-8 is heavier by 50 g/mol, a ratio of 1.05. This means 1 mg of PT-141 contains 975.4 nmol versus 930.1 nmol for SNAP-8.
How many mg of SNAP-8 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 SNAP-8 (MW 1075.2) weighs 1.049 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of PT-141 and SNAP-8
PubChem lists PT-141 as C50H68N14O10 (1025.2 g/mol) and SNAP-8 as C41H70N16O16S (1075.2 g/mol). PT-141 is a cyclic peptide; SNAP-8 is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 10 mg vial of PT-141 equals how many mg of SNAP-8 in moles?
10 mg of PT-141 (MW 1025.2) is 9.754 µmol. The same amount of SNAP-8 (MW 1075.2) would weigh 10.488 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 SNAP-8 in moles?
5 mg of PT-141 (MW 1025.2) is 4.877 µmol. The same amount of SNAP-8 (MW 1075.2) would weigh 5.244 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of SNAP-8 equals how many mg of PT-141 in moles?
5 mg of SNAP-8 (MW 1075.2) is 4.65 µmol. The same amount of PT-141 (MW 1025.2) would weigh 4.767 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of SNAP-8 equals how many mg of PT-141 in moles?
10 mg of SNAP-8 (MW 1075.2) is 9.301 µmol. The same amount of PT-141 (MW 1025.2) would weigh 9.535 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 SNAP-8?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-snap-8/#sqa-040496
APA
Sable Peptides. (2026, October 11). *What is the difference between PT-141 and SNAP-8?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-snap-8/#sqa-040496
BibTeX
@misc{sable_#sqa-040496_2026,
author = {{Sable Peptides}},
title = {{What is the difference between PT-141 and SNAP-8?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/pt-141-vs-snap-8/#sqa-040496}},
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