Sable · Question
What is the difference between Oxytocin and SS-31?
Oxytocin is a nonapeptide neurohypophysial hormone with a disulfide bridge, used as a reference agonist in oxytocin receptor and social-neuroscience research (cyclic nonapeptide, MW about 1007.2 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between Oxytocin and SS-31?
Oxytocin is a nonapeptide neurohypophysial hormone with a disulfide bridge, used as a reference agonist in oxytocin receptor and social-neuroscience research (cyclic nonapeptide, MW about 1007.2 g/mol).
Which is heavier, Oxytocin or SS-31?
Oxytocin has a molecular weight of about 1007.2 g/mol and SS-31 about 639.8 g/mol (PubChem), so Oxytocin is heavier by 367.4 g/mol, a ratio of 1.57. This means 1 mg of Oxytocin contains 992.9 nmol versus 1,563 nmol for SS-31.
How many mg of SS-31 are equimolar to 1 mg of Oxytocin?
1 mg of Oxytocin (MW 1007.2) is 992.9 nmol. The same number of moles of SS-31 (MW 639.8) weighs 0.6352 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Oxytocin and SS-31
PubChem lists Oxytocin as C43H66N12O12S2 (1007.2 g/mol) and SS-31 as C32H49N9O5 (639.8 g/mol). Oxytocin is a cyclic nonapeptide; SS-31 is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 2 mg vial of Oxytocin equals how many mg of SS-31 in moles?
2 mg of Oxytocin (MW 1007.2) is 1.986 µmol. The same amount of SS-31 (MW 639.8) would weigh 1.27 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Oxytocin equals how many mg of SS-31 in moles?
5 mg of Oxytocin (MW 1007.2) is 4.964 µmol. The same amount of SS-31 (MW 639.8) would weigh 3.176 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of SS-31 equals how many mg of Oxytocin in moles?
5 mg of SS-31 (MW 639.8) is 7.815 µmol. The same amount of Oxytocin (MW 1007.2) would weigh 7.871 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of SS-31 equals how many mg of Oxytocin in moles?
10 mg of SS-31 (MW 639.8) is 15.63 µmol. The same amount of Oxytocin (MW 1007.2) would weigh 15.742 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 Oxytocin and SS-31?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/oxytocin-vs-ss-31/#sqa-040357
APA
Sable Peptides. (2026, October 11). *What is the difference between Oxytocin and SS-31?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/oxytocin-vs-ss-31/#sqa-040357
BibTeX
@misc{sable_#sqa-040357_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Oxytocin and SS-31?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/oxytocin-vs-ss-31/#sqa-040357}},
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