Thematic hub
Bacteriostatic Water
Bacteriostatic water is sterile water that contains benzyl alcohol as a preservative, sold in multiple-dose vials and labelled in the US only for diluting or dissolving drugs. This hub answers questions about it from US drug labels, CDC and TGA records and published studies, with each answer dated. Research material is not for human or animal use.
Questions answered here
08- Bacteriostatic water vs sterile water: what is the difference?Bacteriostatic water holds a preservative and sterile water does not. How both differ from WFI, saline and irrigation water, read from US drug labels.Updated 2026-10-14
- What is bacteriostatic water (BAC water)?Bacteriostatic water is sterile water with benzyl alcohol added as a preservative. What the US labels say it contains, its pH, and what studies found about spoilage and stinging.Updated 2026-10-14
- Bacteriostatic water storage: what labels say about the fridge, freezing and expiryWhat US labels, CDC, the TGA and federal rules record about bacteriostatic water storage: label storage statements, refrigeration, freezing, opened vials and expiry dates.Updated 2026-10-14
- Bacteriostatic water: US labels, marketing status and Australian rulesWhat US drug labels on DailyMed state about bacteriostatic water, its marketing applications, benzyl alcohol and opened-vial time limits, with the Australian Poisons Standard and TGA records.Updated 2026-10-14
- Is bacteriostatic water just sterile water? Label specifications and tests comparedBacteriostatic water is not just sterile water. The specification lines on US labels, how preservatives are tested, and what a label cannot show about one vial.Updated 2026-10-14
- How long does bacteriostatic water last? Unopened, opened and in the fridgeHow long bacteriostatic water lasts: what the printed expiry date records for an unopened vial, how manufacturer stability evidence differs from healthcare handling standards for opened vials, and what the sources say about fridge storage and the body's handling of benzyl alcohol.Updated 2026-10-14
- What is bacteriostatic water used for? What labels and studies reportWhat the US label records as the category of bacteriostatic water, what sources say about the preservative, and what three nursing studies of bacteriostatic saline found, with their limits.Updated 2026-10-14
- Bacteriostatic water side effects: what labels, regulators and studies recordReactions and warnings recorded for bacteriostatic water in US labels, a CDC report, an EMA document and published studies, with the study type and size, and where no data exist.Updated 2026-10-14
Form Laboratories supplies research-use-only reference material. Everything in this hub is an educational summary of published third-party literature. It is not medical advice, not a use instruction, and research material is not for human or animal use.