TB500 (Thymosin Beta-4 Fragment), CAS No. 77591-33-4 TB-500 is a laboratory-only synthetic peptide for research applications. It appears as white lyophilized powder, with HPLC-verified purity ≥99%. Full batch documentation including COA and HPLC chromatogram can be provided for quality review. Solubility: Freely soluble in sterile water and bacteriostatic water. Storage Instructions: The lyophilized powder should be stored airtight at -20°C under dry and dark conditions. Short-term storage at 2-8°C is acceptable. Once reconstituted, keep the solution at 2-8°C and use promptly. Do not subject the product to repeated freeze-thaw cycles to maintain biological activity.