How to Store Bacteriostatic (BAC) Water Temperatures, Do's & Don'ts, vialcase.com Do you guys refrigerate your bac water after first use? : r Peptides Should bacteriostatic water be stored in the refrigerator? Uses of Bacteriostatic Water for Injections and Where to Get It Here is how you reconstitute any peptide There is no universal formula for reconstituting peptides. The amount of bacteriostatic water you use depends on the peptide, the dose you're running, and how Bacteriostatic Water for Injection USP Hospira Pfizer 30mL 25 Pack