BAC Water Advanced Research Should BAC water be refrigerated or stored at room temperature? Can Bacteriostatic Water Expire or Go Bad? Wittmer Rejuvenation Clinic Reconstitution Solution for Laboratory Use Bacteriostatic Water 10ml 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