Use this free calculator to reconstitute TB-500 for research: enter the milligrams in your vial and the millilitres of bacteriostatic water, and it returns the concentration in mg/mL, the volume to draw for any target, and the U-100 unit equivalent. The reference data and concentration matrix below are specific to TB-500 and can be checked by hand or cited.
TB-500 reference data
| Class | Synthetic thymosin beta-4 active fragment (acetylated 7-mer, Ac-LKKTETQ) |
|---|---|
| Molecular formula | C38H68N10O14 |
| Molecular weight | 889.0 g/mol |
| CAS | 885340-08-9 |
| PubChem CID | 62707662 |
| Typical vial sizes | 2 mg / 5 mg / 10 mg |
| Storage | Lyophilized: -20 C sealed and desiccated, out of light. Reconstituted: 2-8 C, protect from light; typical ~4-week refrigerated working window. PubChem CID 62707662 is the acetylated active fragment, not full-length thymosin beta-4. |
Concentration matrix for TB-500
Each cell = concentration for that vial mass and diluent volume, with mcg per U-100 unit and nmol/mL (from MW 889.0). Concentration = vial mg ÷ water mL.
| Vial ↓ / Water → | 1 mL | 2 mL | 3 mL | 5 mL |
|---|---|---|---|---|
| 2 mg | 2.00 mg/mL 20.0 mcg/unit · 2250 nmol/mL |
1.00 mg/mL 10.0 mcg/unit · 1125 nmol/mL |
0.67 mg/mL 6.7 mcg/unit · 750 nmol/mL |
0.40 mg/mL 4.0 mcg/unit · 450 nmol/mL |
| 5 mg | 5.00 mg/mL 50.0 mcg/unit · 5624 nmol/mL |
2.50 mg/mL 25.0 mcg/unit · 2812 nmol/mL |
1.67 mg/mL 16.7 mcg/unit · 1875 nmol/mL |
1.00 mg/mL 10.0 mcg/unit · 1125 nmol/mL |
| 10 mg | 10.00 mg/mL 100.0 mcg/unit · 11249 nmol/mL |
5.00 mg/mL 50.0 mcg/unit · 5624 nmol/mL |
3.33 mg/mL 33.3 mcg/unit · 3750 nmol/mL |
2.00 mg/mL 20.0 mcg/unit · 2250 nmol/mL |
Handling & notes
Very high aqueous solubility owing to the two lysine residues and short chain; dissolves in plain sterile or bacteriostatic water without co-solvents. No acidification needed.
All values here are physical-chemistry reference data and fluid-mixing arithmetic for laboratory and research use only. Not dosing, medical, or therapeutic guidance; not intended for human or animal use. Products are sold for research, educational, and demonstration use only.
