![[TEST GLOBAL & US] TB-500](https://oathresearch2.pronizam.com/wp-content/uploads/2026/09/BT10-1-1024x1024-1.png)
Certificate of Analysis
Independent laboratory testing confirms purity and composition of this research peptide.
Endo Passed
Overview
TB-500 is the synthetic form of Thymosin Beta-4, a 43-amino-acid peptide with the molecular formula C212H350N56O78S and a molecular weight of 4,963.4 g/mol. The naturally occurring version of this peptide was first isolated from calf thymus tissue in the 1960s during research into thymus gland extracts. TB-500 corresponds to the active region of the full Thymosin Beta-4 sequence.
Structurally, Thymosin Beta-4 is an unstructured, highly flexible peptide in solution, meaning it does not fold into a fixed three-dimensional shape the way many larger proteins do. It contains a central actin-binding domain — a stretch of amino acids structurally complementary to actin, one of the most common structural proteins in biology. The compound is identified by CAS number 77591-33-4 and appears as a white to off-white lyophilized powder that is soluble in water. It should be stored frozen for long-term stability.
This product is strictly for research purposes only.
PubChem Reference: View compound profile on NIH PubChem
This product is strictly for research purposes only. Not approved for human or animal use.
Key Characteristics
MOLECULAR PROFILE
Formula: C212H350N56O78S
Weight: 4963.4 g/mol
CAS: 77591-33-4
Structure: 43 amino acid peptide
PHYSICAL PROPERTIES
Form: Lyophilized powder
Solubility: Water-soluble
Appearance: White to off-white powder
Storage: Store in freezer for long-term stability
