TB-500 Acetate (Thymosin Beta-4 Fragment)
TB-500 acetate, a synthetic thymosin beta-4 fragment at 98.9% HPLC purity, supplied lyophilized with full third-party assay documentation.
- Purity (HPLC)
- 98.9%
- Fill weight
- 2 mg / vial
- CAS number
- 77591-33-4
- Form
- Lyophilized powder
- Assay
- RP-HPLC + mass spectrometry
- Storage
- −20 °C, protected from light
About TB-500 as a reference compound
TB-500 is the synthetic acetate salt of an active fragment of thymosin beta-4, used as a reference standard in cytoskeletal and actin-binding research. PureLabs supplies TB-500 lyophilized in amber vials, sealed under nitrogen to limit oxidation. Each production run is verified for identity, purity and residual solvent content before release, and limited-batch stock is dispatched in the order received.
Handling and storage
- Store lyophilized vials at −20 °C in the original sealed container.
- Reconstitute slowly down the vial wall; do not shake vigorously.
- Keep reconstituted solution at 2–8 °C and use within 14 days.
- Record batch reference on all derived aliquots for traceability.
TB-500 — frequently asked questions
Common laboratory questions about sourcing, purity, storage and shipping of TB-500.
Is TB-500 the same as thymosin beta-4?
No. TB-500 is a synthetic fragment of the larger thymosin beta-4 protein, supplied here as the acetate salt for laboratory reference use.
Why is this listed as a limited batch?
Limited batches are smaller production runs released after third-party assay. When the batch is exhausted, a new reference number is issued.
What is the difference between TB-500 and thymosin beta-4?
TB-500 is the synthetic active fragment of the larger thymosin beta-4 protein, which makes it simpler to synthesize and characterize as a laboratory reference compound.
What solvent is recommended for TB-500?
Bacteriostatic water is standard for laboratory handling; sterile water or a suitable buffer also works where preservative-free solution is required.
Is a certificate of analysis included with TB-500?
Yes — every vial carries a batch reference that maps to its own HPLC chromatogram and mass-spectrometry trace, supplied with the order.
Why is TB-500 a limited batch?
Production runs are sized to the assay cycle so stock is always recently synthesized rather than held long-term in inventory.