Sable · Question
What is the difference between Thymosin alpha-1 and TB-500?
Thymosin alpha-1 is a 28-residue N-acetylated peptide originally isolated from thymus tissue (thymosin fraction 5), studied in immunology research (peptide, MW about 3108.3 g/mol).
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Last verified 2026-10-10
What is the difference between Thymosin alpha-1 and TB-500?
Thymosin alpha-1 is a 28-residue N-acetylated peptide originally isolated from thymus tissue (thymosin fraction 5), studied in immunology research (peptide, MW about 3108.3 g/mol).
Which is heavier, Thymosin alpha-1 or TB-500?
Thymosin alpha-1 has a molecular weight of about 3108.3 g/mol and TB-500 about 889 g/mol (PubChem), so Thymosin alpha-1 is heavier by 2,219.3 g/mol, a ratio of 3.5. This means 1 mg of Thymosin alpha-1 contains 321.7 nmol versus 1,124.9 nmol for TB-500.
How many mg of TB-500 are equimolar to 1 mg of Thymosin alpha-1?
1 mg of Thymosin alpha-1 (MW 3108.3) is 321.7 nmol. The same number of moles of TB-500 (MW 889) weighs 0.286 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Thymosin alpha-1 and TB-500
PubChem lists Thymosin alpha-1 as C129H215N33O55 (3108.3 g/mol) and TB-500 as C38H68N10O14 (889 g/mol). Thymosin alpha-1 is a peptide; TB-500 is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 10 mg vial of TB-500 equals how many mg of Thymosin alpha-1 in moles?
10 mg of TB-500 (MW 889) is 11.249 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 34.964 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 2 mg vial of TB-500 equals how many mg of Thymosin alpha-1 in moles?
2 mg of TB-500 (MW 889) is 2.25 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 6.993 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of TB-500 equals how many mg of Thymosin alpha-1 in moles?
5 mg of TB-500 (MW 889) is 5.624 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 17.482 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 15 mg vial of TB-500 equals how many mg of Thymosin alpha-1 in moles?
15 mg of TB-500 (MW 889) is 16.873 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 52.446 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 20 mg vial of TB-500 equals how many mg of Thymosin alpha-1 in moles?
20 mg of TB-500 (MW 889) is 22.497 µmol. The same amount of Thymosin alpha-1 (MW 3108.3) would weigh 69.928 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 TB-500 in moles?
5 mg of Thymosin alpha-1 (MW 3108.3) is 1.609 µmol. The same amount of TB-500 (MW 889) would weigh 1.43 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 TB-500 in moles?
10 mg of Thymosin alpha-1 (MW 3108.3) is 3.217 µmol. The same amount of TB-500 (MW 889) would weigh 2.86 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
More questions about thymosin-alpha-1
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 Thymosin alpha-1 and TB-500?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/tb-500-vs-thymosin-alpha-1/#sqa-041028
APA
Sable Peptides. (2026, October 11). *What is the difference between Thymosin alpha-1 and TB-500?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/tb-500-vs-thymosin-alpha-1/#sqa-041028
BibTeX
@misc{sable_#sqa-041028_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Thymosin alpha-1 and TB-500?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/tb-500-vs-thymosin-alpha-1/#sqa-041028}},
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