Sable · Question
What is the difference between SS-31 and Semax?
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 Semax?
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 Semax?
SS-31 has a molecular weight of about 639.8 g/mol and Semax about 813.9 g/mol (PubChem), so Semax is heavier by 174.1 g/mol, a ratio of 1.27. This means 1 mg of SS-31 contains 1,563 nmol versus 1,228.7 nmol for Semax.
How many mg of Semax 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 Semax (MW 813.9) weighs 1.272 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of SS-31 and Semax
PubChem lists SS-31 as C32H49N9O5 (639.8 g/mol) and Semax as C37H51N9O10S (813.9 g/mol). SS-31 is a peptide; Semax 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 Semax in moles?
5 mg of SS-31 (MW 639.8) is 7.815 µmol. The same amount of Semax (MW 813.9) would weigh 6.361 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 Semax in moles?
10 mg of SS-31 (MW 639.8) is 15.63 µmol. The same amount of Semax (MW 813.9) would weigh 12.721 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Semax equals how many mg of SS-31 in moles?
5 mg of Semax (MW 813.9) is 6.143 µmol. The same amount of SS-31 (MW 639.8) would weigh 3.93 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Semax equals how many mg of SS-31 in moles?
10 mg of Semax (MW 813.9) is 12.287 µmol. The same amount of SS-31 (MW 639.8) would weigh 7.861 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 30 mg vial of Semax equals how many mg of SS-31 in moles?
30 mg of Semax (MW 813.9) is 36.86 µmol. The same amount of SS-31 (MW 639.8) would weigh 23.583 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 Semax?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/semax-vs-ss-31/#sqa-040606
APA
Sable Peptides. (2026, October 11). *What is the difference between SS-31 and Semax?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/semax-vs-ss-31/#sqa-040606
BibTeX
@misc{sable_#sqa-040606_2026,
author = {{Sable Peptides}},
title = {{What is the difference between SS-31 and Semax?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/semax-vs-ss-31/#sqa-040606}},
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