Bacteriostatic Saline for Injection 0.9% Sodium Chloride TM BioWater Bacteriostatic Water (BAC) 30mL Glass Vial Bacteriostaticwater.com Bacteriostatic Water vs Sterile Water: Key Differences DID YOU KNOW? Bacteriostatic Water contains 0.9% benzyl alcohol, which prevents bacteria from growing after the vial is opened. This makes it safe to use for up to 28 days once punctured DID YOU KNOW? Bacteriostatic Water contains 0.9% benzyl alcohol, which prevents bacteria from growing after the vial is opened. This makes it safe to use for up to 28 days once punctured