How to Store Bacteriostatic Water Safely Confused about whether BAC water needs refrigeration after opening? According to USP standards and Pfizer's own guidance, both room temp (2025C) and refrigeration are acceptable Bacteriostatic Water (BAC) Gateway Peptides BAC Water Bacteriostatic Water 0.9% Benzyl Alcohol 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 (Pfizer) Growth Guys