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 Should BAC water be refrigerated or stored at room temperature? Can bacteriostatic water be stored at room temperature for reuse another day? Uses of Bacteriostatic Water for Injections and Where to Get It Pfizer Hospira Bacteriostatic Water 30 mL Peptide Test