Bacteriostatic Water (Bac Water) Nationwide Peptides by National Science Labs, LLC How to Store Bacteriostatic (BAC) Water Temperatures, Do's & Don'ts, vialcase.com BACTERIOSTATIC WATER FOR INJECTION, USP 30mL VIAL 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 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