Sterile Bacteriostatic water is a multi-dose sterile water for injection used for diluting medications prior to injection. Bacteriostatic water is packaged in a multiple dose plastic vial that can be reused several times before needing to discard. Bacteriostatic water for injection contains 0.9% of benzyl alcohol as a bacteriostatic preservative. Benzyl alcohol suppresses or stops the growth of most potentially contaminating bacteria. Benzyl alcohol, is safe to us and is naturally made by many plants and is commonly found in fruits, teas and essential oils like jasmine.