TB-500 (Thymosin Beta-4 fragment) — reference peptide material for laboratory research. Not a medicinal product and not a recovery agent for humans. Identification. The fragment CAS is often listed as 885340-08-9; confirmed in batch documentation. Form: lyophilized powder. Net content is the mass in the package, not a dose. Documentation. Batch COA/SDS available to qualified organizations upon request, where applicable. We do not use “99% purity” claims without a batch file. Intended use. Laboratory research only. No administration protocols.