How Much Bacteriostatic Water to Add to a Peptide Vial
Choosing diluent volume is a precision decision, not a fixed rule.
By PX1 Research Team · August 4, 2026
How Much Bacteriostatic Water to Add to a Peptide Vial
The trade-off
More diluent means larger draw volumes and better syringe precision but a shorter usable window per vial. Less diluent means more concentrated material and tiny, less accurate draws.
Common preparations
| Vial | Diluent | Concentration |
|---|---|---|
| 5 mg | 2 mL | 2.5 mg/mL |
| 10 mg | 2 mL | 5 mg/mL |
| 10 mg | 1 mL | 10 mg/mL |
| 30 mg | 3 mL | 10 mg/mL |
| 50 mg | 5 mL | 10 mg/mL |
Rule of thumb
Choose the volume that places your target amount between 10 and 50 units on a U-100 syringe.
How PX1 documents every lot
Every PX1 lot ships with HPLC purity, LC-MS identity, residual solvent, moisture (Karl Fischer), sterility and endotoxin data. Lot documentation is published at /purity-reports, /endotoxin-reports and /coa. Synthesis, purification, lyophilization and vial fill happen in U.S. facilities — see /manufacturing-process.
Research use only. PX1 Research supplies compounds for laboratory and in-vitro research. Nothing here is medical advice, a dosing recommendation, or an offer for human or veterinary use. Figures cited are reported from published laboratory literature.