How to Store BAC Water After Opening Should BAC water be refrigerated or stored at room temperature? Bacteriostatic Water Vials 5 Pack 30ml BAC Water Westend Medical Supply Should BAC water be refrigerated or stored at room temperature? Should BAC water be refrigerated or stored at room temperature? 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