Uses of Bacteriostatic Water for Injections and Where to Get It Exel 3cc Syringe and Needle (Box of 100) 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 Bacteriostatic Water For Injection 30ml Vial Bacteriostatic Sterile Water for Injection 30 mL Multi Dose Vial SKU 954664