TB-500 is listed here as thymosin beta-4 acetate, a 43-amino-acid research peptide with CAS number 77591-33-4 and molecular weight of approximately 4963.44 Da. It has been studied for its role in cell migration, blood vessel formation, and tissue repair processes. Sold for research use only.

What purity is your TB-500?

Our TB-500 is independently tested by Janoshik Analytical (ISO 17025 accredited) at 99%+ purity via HPLC. The Certificate of Analysis is published on the product page.

Tissue Research

TB-500

Full-Length Thymosin β4 Acetate

-15%

Strength

5mg
10mg

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Current batch

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Testing

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Batch B002

Brief Description

Synthetic thymosin beta-4 acetate research peptide studied in actin regulation, cellular migration, angiogenesis, and tissue remodeling. For research use only — not for human consumption.

Batch Documentation

BatchTrace

Track this exact batch before availability.

Scan vial QR → match batch code → verify Janoshik report.

Public batch ID: TB500-B001

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Current batch status

⏳

Batch B002 · Testing In Progress

Independent analytical testing is in progress · Results will be posted once finalized

Independent analytical testing is taking longer than expected. Sale is temporarily suspended until the final results are received and reviewed. Updated reports will be posted here once finalized.

Additional screens

Endotoxin

Janoshik #194126: 6.065 EU/vial

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Research & library

Research review

Scientific background, literature, and compound context

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COA library

Browse current and supporting batch documentation

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Scope limit: COAs document analytical testing for research materials. They are not medical-use, diagnostic, or treatment claims.

Batch 002 Transparency Note

Transparency update

Due to recent supply chain and international shipping disruptions, some Batch 002 inventory may include vials produced at different points within our supplier’s production cycle. As a result, researchers may notice minor packaging variations, including differences in vial caps.

These products were sourced from the same established manufacturers we have worked with for ongoing quality and third-party testing. That said, we want to be transparent that Batch 002 may not represent a single uninterrupted production run.

We are already working with our suppliers to strengthen batch-control, packaging, and documentation protocols before Batch 003.

Current batch by strength

5mg

Batch 002

10mg

Batch 002

If you need a specific production run, match the selected strength to the batch listed here before opening the COA link.

Compound Specifications

CAS
77591-33-4

MW
4963.44 Da

Purity
98.48%

TB-500 / Thymosin β4 Naming

TB-500 is commonly used as a catalog name in the research peptide market. This product is identified as full-length thymosin β4 acetate — a 43-amino-acid peptide with molecular weight 4963.44 Da — rather than a separately identified shorter TB-500 fragment.

Batch COA/testing documentation is used to verify the material identity.

Storage & Handling

Lyophilized: Stable at room temperature; freezer (−20°C) recommended for long-term storage
Reconstituted: 2–8°C, use within 30 days
Solvent: Bacteriostatic water

For research use only — not for human consumption

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Additional information

Additional information

Weight	0.94 oz
Strength	5mg, 10mg

⚠️ Research Use Only — This product is intended exclusively for in vitro laboratory research. Not for human or animal use. Not for diagnostic or therapeutic purposes. Not for resale.

SKU: STG-40-1770339104 Category: Tissue Research

TB-500

Additional information

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