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Thymosin Alpha 1 is a 28-amino-acid peptide with the molecular formula C129H215N33O55 and a molecular weight of 3,108.32 g/mol (CAS 62304-98-7). First isolated in 1977 from a calf thymus extract called Thymosin Fraction 5, it is also known as thymalfasin. The peptide has an acetyl group attached to its N-terminus and begins with serine. It contains no cysteine residues and no disulfide bonds, giving it a straightforward linear structure. Thymosin Alpha 1 is classified as a thymic peptide, part of a family of compounds originally derived from the thymus gland. It is supplied as a white to off-white lyophilized powder, soluble in water, and requires refrigeration when reconstituted. This product is strictly for research purposes only.
ℹ️ Note: 1 kit includes 10 vials
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Thymosin Alpha 1 is a 28-amino-acid peptide with the molecular formula C129H215N33O55 and a molecular weight of 3,108.32 g/mol. It was first isolated in 1977 from Thymosin Fraction 5, a partially purified extract of calf thymus tissue. The compound is identified by CAS number 62304-98-7 and is also known by the name thymalfasin.
Structurally, Thymosin Alpha 1 is an acetylated peptide — meaning it has an acetyl group attached to its N-terminus (the starting end of the amino acid chain), beginning with serine. It lacks cysteine residues and therefore contains no disulfide bonds, which contributes to its relatively straightforward linear structure. The peptide is classified as a thymic peptide, belonging to a family of compounds originally derived from the thymus gland, an organ located behind the breastbone. It is supplied as a white to off-white lyophilized powder, soluble in water, and requires refrigeration when reconstituted.
This product is strictly for research purposes only.
PubChem Reference: View compound profile on NIH PubChem
This product is strictly for research purposes only. Not approved for human or animal use.
Formula: C129H215N33O55
Weight: 3108.32 g/mol
CAS: 62304-98-7
Structure: 28 amino acid peptide
Form: White to off-white lyophilized powder
Solubility: Water-soluble
Storage: Requires refrigeration when reconstituted
Also Known As: Thymalfasin
| Weight | 5mg, 10mg |
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Elena Vasquez –
Good purity, arrived quickly
The 99% purity matched the COA. Used in a cell culture assay consistent results. Would appreciate more detailed reconstitution guidelines
Lauren D –
Strong attention to quality and detail. Very happy with my purchase
Joshua Chloe –
You can tell the company focuses on quality first. Very impressed
Nathan Macmil –
Outstanding company with dependable service. I highly recommend Peptides Vitals.
Amanda Ryan –
Very satisfied customer here. I recommend everyone to order from Peptides Vitals.
Fred Macmil –
My package took longer than expected, but the support team handled it professionally. Delivery was successful
Hartnel smith’s –
Reliable quality products with secure packaging and professional standards.
Jordan Michigan –
satisfied customer here. I recommend everyone to order from Peptides Vitals
Owen Dan –
A courier issue caused some delay, but Peptides Vitals was professional and the package arrived safely
Natalia Popova –
Happy with international delivery
Shipped to Russia with proper documentation. The peptide worked fine in our flow cytometry experiments. Thank you
Megan O’Sullivan –
Nice addition to our thymosin panel
We’re testing multiple thymosins. Alpha-1 from Peptides Vital held up well in parallel assays. No complaints
Christina W. Zhao –
Helpful for our dose-response curve
Used in 5 concentrations — clean peptide peak on HPLC. No degradation issues. Thanks for the free shipping over $200.
Andre Fontaine –
Does the job for basic science
We saw expected biological activity in vitro. Not outstanding, but reliable enough for preliminary data. Shipping to EU took 3 days.
Priya Sharma –
Works as described
Reconstituted easily. Stability under -20°C was fine for 3 months. Would buy again for non-clinical work
Jonathan P. Myers –
Met expectations for research grade
Not the highest rating from me, but still a useful peptide for our T-cell modulation study. Customer service responded within a day.
Rachel K. Ikeda –
Decent batch consistency
Ordered two separate vials. Both showed similar activity in our ELISpot assay. A good option for early-stage research.
Samuel Greer –
We ran a small pilot with Thymosin Alpha-1. Results were promising, though we’ll need to repeat for significance. Shipping was fast and well-packaged
Vanessa C –
Good experience overall I saw the low average rating but decided to try it. Our results were actually quite consistent. Perhaps newer batches improved.