How to Store Bacteriostatic (BAC) Water Temperatures, Do's & Don'ts, vialcase.com Should BAC water be refrigerated or stored at room temperature? Pfizer Hospira Bacteriostatic Water 30 mL Peptide Test Bacteriostatic Water Bac Water by Hospira Mountainside Medical 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