CANLABS: Does BAC Water Expire? Have had for a year in fridge. : r Peptides RETA & BAC WATER MIXING, UNITS, MG WHAT IT MEAN?! 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 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