Buy Bacteriostatic Water for Research Licensed Peptides Can bacteriostatic water be stored at room temperature for reuse another day? Should BAC water be refrigerated or stored at room temperature? Can Bacteriostatic Water Expire or Go Bad? Wittmer Rejuvenation Clinic Pfizer Hospira Bacteriostatic Water 30 mL Peptide Test 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