Thymosin Alpha-1
Thymosin Alpha-1 is a synthetic 28-residue peptide corresponding to thymosin α1, with the molecular formula C129H215N33O55 and a molecular weight of 3108.32 g/mol.

Identity & structure
Verified identifiers, sequence, and analytical properties — every value machine-readable and independently sourceable against PubChem.
Primary sequence · 28 residues · N-terminal Acetyl.
| Identity | |
|---|---|
| CAS | 62304-98-7 |
| PubChem CID | 16130571 |
| FDA UNII | W0B22ISQ1C |
| Also known as | Thymosin alpha 1, Thymosin alpha-1, Thymosin alpha 1 peptide, Thymalfasin, alpha1-Thymosin |
| Research class | Regenerative & Cytoprotective |
| Structure | |
| Molecular formula | C129H215N33O55 |
| InChIKey | NZVYCXVTEHPMHE-ZSUJOUNUSA-N |
| Sequence | 28-residue peptide |
| Length | 28 residues |
| Analytical | |
| Average molecular weight | 3108.32 g/mol |
| Monoisotopic mass | 3106.5041 Da |
| Form | Lyophilized powder |
| Solubility | Water-soluble |
| Storage | 2–8 °C, desiccated |
Where Thymosin Alpha-1 sits in its class
Molecular weight (g/mol) across the 15 characterized compounds in Regenerative & Cytoprotective. Compare all compounds →
Research context
Thymosin Alpha-1 is a synthetic 28-residue peptide corresponding to thymosin α1, with the molecular formula C129H215N33O55 and a molecular weight of 3108.32 g/mol. It is studied in immunological research and is supplied as a characterized reference material, verified by reversed-phase HPLC and mass spectrometry.
Supplied solely as a characterized research material. No representation is made as to any biological effect. For Research Use Only — not for human or veterinary use.
How Thymosin Alpha-1 is identified
Identity and purity are measured, not asserted. Electrospray mass spectrometry (ESI-MS) determines the mass-to-charge ratio of the intact molecule — an observed value matching the expected series above confirms the molecular formula. Reversed-phase HPLC separates the sample over time, and purity is read as arithmetic: the target peak’s area as a share of total peak area.
Handling & stability
Physical form, storage, and solubility as supplied. Handling guidance only — no use protocols.
Related compounds
Other compounds in this research class.
Frequently asked questions
What is Thymosin Alpha-1?
What is the molecular formula of Thymosin Alpha-1?
What is the CAS number of Thymosin Alpha-1?
How is the identity of Thymosin Alpha-1 confirmed?
How should Thymosin Alpha-1 be stored?
Is Thymosin Alpha-1 a peptide?
Is Thymosin Alpha-1 approved for human use?
Data, tools & certificates
References
- PubChem — compound identity, structure & computed properties (CID 16130571). PubChem →
- CAS Registry Number 62304-98-7.
- FDA Global Substance Registration System — UNII W0B22ISQ1C.
Research professionals only
Thymosin Alpha-1 — from the record to the bench
The monograph and every lot certificate stay public. Pricing and ordering open for verified research professionals.