Last reviewed: October 2026 · Cleared Peptides research team
Thymalin is a complex of peptides extracted from bovine thymus, developed in the Soviet/Russian peptide-bioregulator research programme associated with V. Khavinson and V. Morozov. Unlike single synthetic peptides, it is a mixture, so it is characterized by composition rather than a single formula.
Thymalin Structure and Identifiers
| Name | Thymalin |
|---|---|
| Type | Thymus-derived peptide preparation |
| CAS number | Not available. A single CAS Registry Number is not assigned because this material is a peptide mixture rather than one discrete compound. |
| Molecular formula | Mixture — no single formula |
| Quality | Composition testing per lot COA |
| Form | Lyophilized powder |
Thymalin and Synthetic Bioregulators
Research on thymus extracts such as Thymalin led to the design of short synthetic peptides like Vilon (Lys-Glu), which was identified as an active fragment, and Crystagen. See our peptide bioregulators guide.
Published Research Areas
- Immunology research models
- Comparisons with synthetic thymic peptides such as Thymosin Alpha-1
This summary describes laboratory research only and makes no claim about effects in humans or animals.
Purity Testing and Storage
Every lot of Thymalin supplied by Cleared Peptides is tested by an independent laboratory for identity and purity (or composition, for multi-component preparations), and the lot Certificate of Analysis is published on our COA page. Store lyophilized Thymalin at −20 °C, sealed, dry and protected from light. Allow the vial to reach room temperature before opening and minimize freeze–thaw cycles. Handle according to your institution’s chemical-hygiene procedures.
Research materials referenced in this guide
Frequently Asked Questions
Why does Thymalin not have a CAS number?
Because it is a mixture of thymus-derived peptides rather than a single defined compound.
Is Thymalin for human use?
No. Cleared Peptides supplies Thymalin for laboratory research use only; it is not for human or veterinary use.
Selected References
Thymalin is described in the peptide-bioregulator literature as a thymus-derived peptide mixture. Because it is a mixture, a single CAS number is not available. No single sequence or molecular formula is assigned on this page.
Laboratory note: solubility depends on salt form and solvent. This guide does not state a single solubility figure. Handling of lyophilized material is described in the peptide storage guide.
Research Use Only Notice
This guide is provided for educational and laboratory reference purposes. It summarizes published, primarily in-vitro and structural research literature and does not describe, recommend or imply any use in humans or animals. Products sold by Cleared Peptides are for laboratory research use only; they are not drugs, foods, cosmetics or dietary supplements, are not FDA-approved, and are not intended to diagnose, treat, cure, mitigate or prevent any disease. No dosing, administration or therapeutic information is provided.
