

Thymalin 20 mg
Thymic peptide preparation studied in immune and ageing research.
In stock · ships same day on orders before 2pm ET
Wholesale pricing starts at 25 vials per SKU, with net-30 terms for verified institutions. It is quoted per order rather than applied in the cart — ask for a wholesale quote.
Every lot of Thymalin in the COA library · Latest lot report
Ships same day on orders before 2pm ET. For laboratory research use only. Not for human or animal consumption.
Supplies researchers add to this order

What is Thymalin?
Thymalin is the name of a thymic peptide preparation from the Khavinson bioregulator series, studied in immune and ageing research. The lot sold here carries a certificate whose identity line reports a mass of 858.8, which is the mass of thymulin, the defined thymic nonapeptide, rather than of a mixture; the research guide sets out what that means for a methods section. Pepstral supplies it as a lyophilized powder for in-vitro laboratory research only.
→Read the full Thymalin research guide
What is Thymalin studied for?
- Immune-parameter studies in ageing models
- Thymic peptide comparisons
- Lymphocyte population assays
- Bioregulator series research
All applications above are in-vitro or preclinical research contexts. Thymalin is sold for laboratory research only and is not for human or animal use.
What does the certificate for lot THYM20-0318 show?
Every lot of Thymalin is tested by an independent US laboratory before it is listed. The report for lot THYM20-0318 is in the COA library and the lot number printed on the vial matches it. The current results:
| Test | Method | Lot THYM20-0318 result |
|---|---|---|
| Identity | MALDI-MS | Thymalin · conforms |
| Content | HPLC quantitation | 18.79 mg |
| Purity | RP-HPLC (214 nm) | 99.8% |
| Endotoxin | USP <85> | ≤0.05 EU/mL |
How is Thymalin handled and stored?
Sealed vials are stored at -20°C away from light and keep for 24 months. To reconstitute, add bacteriostatic water slowly down the inside wall of the vial and swirl until clear; never shake. Once in solution, keep at 2 to 8°C and use within our 28-day default for a preserved solution. The concentration table gives the dilution volumes and microlitre aliquots for this vial.
Frequently asked questions
Is thymalin a single defined peptide?
The name refers to a preparation, but the certificate for this lot reports a single mass, 858.8, matching the nonapeptide thymulin. Record the lot number and the certificate in any methods section rather than either name alone.
How does it differ from thymosin alpha-1?
Thymosin alpha-1 is a defined 28-residue synthetic sequence; thymalin is a preparation from the bioregulator literature.
Is Thymalin for human use?
No. Every product on this site is sold for in-vitro laboratory research only and is not for human or animal consumption, diagnostic or therapeutic use.
Also ordered as part of immune set.
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