Sable · Question
What is the difference between SS-31 and Thymosin alpha-1?
SS-31 is a mitochondria-targeted tetrapeptide (Szeto-Schiller peptide) that associates with cardiolipin in the inner mitochondrial membrane, studied in mitochondrial bioenergetics research (peptide, MW about 639.8 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between SS-31 and Thymosin alpha-1?
SS-31 is a mitochondria-targeted tetrapeptide (Szeto-Schiller peptide) that associates with cardiolipin in the inner mitochondrial membrane, studied in mitochondrial bioenergetics research (peptide, MW about 639.8 g/mol).
Which is heavier, SS-31 or Thymosin alpha-1?
SS-31 has a molecular weight of about 639.8 g/mol and Thymosin alpha-1 about 3108.3 g/mol (PubChem), so Thymosin alpha-1 is heavier by 2,468.5 g/mol, a ratio of 4.86. This means 1 mg of SS-31 contains 1,563 nmol versus 321.7 nmol for Thymosin alpha-1.
How many mg of Thymosin alpha-1 are equimolar to 1 mg of SS-31?
1 mg of SS-31 (MW 639.8) is 1,563 nmol. The same number of moles of Thymosin alpha-1 (MW 3108.3) weighs 4.858 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of SS-31 and Thymosin alpha-1
PubChem lists SS-31 as C32H49N9O5 (639.8 g/mol) and Thymosin alpha-1 as C129H215N33O55 (3108.3 g/mol). SS-31 is a peptide; Thymosin alpha-1 is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 5 mg vial of SS-31 equals how many mg of Thymosin alpha-1 in moles?
5 mg of SS-31 (MW 639.8) is 7.815 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 24.291 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 Thymosin alpha-1 in moles?
10 mg of SS-31 (MW 639.8) is 15.63 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 48.582 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Thymosin alpha-1 equals how many mg of SS-31 in moles?
5 mg of Thymosin alpha-1 (MW 3108.3) is 1.609 µmol. The same amount of SS-31 (MW 639.8) would weigh 1.029 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Thymosin alpha-1 equals how many mg of SS-31 in moles?
10 mg of Thymosin alpha-1 (MW 3108.3) is 3.217 µmol. The same amount of SS-31 (MW 639.8) would weigh 2.058 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 SS-31 and Thymosin alpha-1?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/ss-31-vs-thymosin-alpha-1/#sqa-040618
APA
Sable Peptides. (2026, October 11). *What is the difference between SS-31 and Thymosin alpha-1?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/ss-31-vs-thymosin-alpha-1/#sqa-040618
BibTeX
@misc{sable_#sqa-040618_2026,
author = {{Sable Peptides}},
title = {{What is the difference between SS-31 and Thymosin alpha-1?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/ss-31-vs-thymosin-alpha-1/#sqa-040618}},
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