Bacteriostatic Water (Bac Water) 10ML SSP Research You should only be using Hospira branded bacteriostatic water to reconstitute your peptides. Not that Amazon stuff. None of that Chinese bac water stuff. Just Hospira. The difference between Hospira and other 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 Understanding proper reconstitution methods is critical in peptide research. Sterile water is single use, while bacteriostatic water contains preservatives that allow for multiple uses in controlled environments. For research purposes only. Not intended Bacteriostatic Water 30ml (2 Pack) Bacteriostatic Water vs Reconstitution Solution Guide