Source comparison
TB-500 Reconstitution: Comparison of Water Types and Handling Methods
Bacteriostatic Water (USP) 0.9% 28 days post-puncture 5.5–6.0 Multi-dose vials for research use over 2–4 weeks Required for any TB-500 vial used more than once. Bacterial inhibition is non-negotiable for peptide stability Sterile Water (USP) 0% 24–48 hours pos
This comparison does not assign a generated winner or score.
- Bacteriostatic Water (USP)
- 0.9%
- 28 days post-puncture
- 5.5–6.0
- Multi-dose vials for research use over 2–4 weeks
- Required for any TB-500 vial used more than once. Bacterial inhibition is non-negotiable for peptide stability
- Sterile Water (USP)
- 0%
- 24–48 hours post-puncture
- 6.5–7.0
- Single-dose immediate use only
- Only appropriate if the entire vial is used within 24 hours. Bacterial growth begins immediately after seal puncture
- 0.9% Sodium Chloride (Saline)
- 0% (unless labeled bacteriostatic)
- 24–48 hours
- 5.0–7.0
- Not recommended for TB-500
- Chloride ions can accelerate oxidation of methionine residues in Thymosin Beta-4. Avoid unless protocol specifies
- Reconstitution + Shaking
- N/A
- Never acceptable
- Mechanical shear denatures beta-sheet structure irreversibly. Foam formation indicates permanent potency loss
- Reconstitution + Passive Dissolution
- Standard protocol
- Allows peptide to hydrate without structural stress. Measurably higher receptor binding in comparative assays