Uses of Bacteriostatic Water for Injections and Where to Get It Bacteriostatic Water Pure Health Peptides This BAC water froze in my fridge (opened it a month ago) safe to use after defrosting? : r Retatrutide Uses of Bacteriostatic Water for Injections and Where to Get It Your eyes are your first line of defense. Good BAC Water: Crystal clear, odorless (faint alcohol scent), and painless. Bad BAC Water: Cloudy, particulate matter, strong chemical smell, or severe burning.