Uses of Bacteriostatic Water for Injections and Where to Get It Can bacteriostatic water be stored at room temperature for reuse another day? 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 for Injection: Package Insert Prescribing Info