TB-500
TB-500 is a synthetic peptide fragment corresponding to a region of thymosin beta-4. Supplied lyophilized as a reference material for in-vitro research.
TB-500 (Thymosin Beta-4 fragment) (CAS 885340-08-9) is a lyophilized peptide reference material for laboratory and analytical research. The current batch TB-2605-A measured HPLC 99.2% (COA May 11, 2026) and has 3 independent third-party lab tests on public record. Research use only - not for human or veterinary use.
TB-500 specifications
| Compound | TB-500 (Thymosin Beta-4 fragment) |
|---|---|
| CAS number | 885340-08-9 |
| Format | Lyophilized powder, 3 ml vial (5 mg / 10 mg) |
| Current batch | TB-2605-A (COA May 11, 2026) |
| HPLC purity (batch verification) | 99.2% |
| LC-MS identity | Not tested |
| Endotoxin | Not tested |
| Sterility | Not tested |
| Sample origin | Per batch record |
| Independent tests | 3 third-party lab results, public |
| Price - 5 mg (indicative) | $29 per vial |
| Price - 10 mg (indicative) | $49 per vial |
| Storage | Lyophilized: store at -20 °C, ~24 months. In solution (2-8 °C), protect from light; solution stability varies with solvent and handling. |
| Intended use | Laboratory and analytical research only. Not for human or veterinary use. |
Common questions about TB-500
Is Pepdor's TB-500 independently tested?
Yes. Beyond the batch-verification HPLC COA on every batch, 3 independent third-party lab tests are published unedited in the public Test Ledger. Results are posted as received, whatever they show.
What purity is the current TB-500 batch?
Current batch TB-2605-A (COA May 11, 2026) measured 99.2% by batch-verification HPLC, with independent third-party tests averaging 99.2%. Full history for every batch, including archived ones, stays public.
How do I verify a TB-500 batch before ordering?
Every vial label carries its batch number (currently TB-2605-A). Look the batch up in the public Test Ledger or the machine-readable feed at pepdor.com/ledger.json to see the COA and all independent test results before ordering.
What documentation ships with TB-500?
Every vial carries its batch number and links to a published COA (batch-verification HPLC; LC-MS identity, endotoxin, and sterility shown per batch where tested). Indicative launch pricing - 5 mg: $29 per vial; 10 mg: $49 per vial. Sourced direct from the synthesis facility.
How should TB-500 be stored?
Lyophilized: store at -20 °C, ~24 months. In solution (2-8 °C), protect from light; solution stability varies with solvent and handling.