Bac Water Made for Peptides Bac Water Catalog Bacteriostatic Water UMBRELLA Labs Should BAC water be refrigerated or stored at room temperature? Reconstitution = mixing your peptide powder with bacteriostatic water, Best practice:, Room temp bac water, Inject slowly along vial wall, Avoid foam bubbles, Gently swirl (never shake), I never fail to recon at all times. Room temp hospira bac water and vial for the win !!!! What Is Bacteriostatic Water For Injection Used For? Molewater