Description
Bacteriostatic water is sterile water containing a small amount of benzyl alcohol (usually 0.9%), which helps inhibit bacterial growth after the vial has been opened.
It is commonly used as a diluent for certain injectable medications that are supplied as powders or concentrates and need to be mixed before use.
- 💧 Reconstitution: Dissolves compatible powdered medications before administration.
- 🦠 Bacteriostatic preservative: Benzyl alcohol helps reduce bacterial growth after repeated vial entries.
- 💉 Multi-dose use: Unlike plain sterile water, bacteriostatic water is typically supplied in multi-dose containers that can be entered more than once when handled correctly.
- 🧊 Peptide/research applications: In laboratory and research settings, it is commonly used to reconstitute compatible lyophilized peptides.
- ⚠️ Important: It isn’t interchangeable with sterile water or bacteriostatic saline in every application. The appropriate diluent depends on the specific product and its manufacturer’s instructions.
In simple terms: bacteriostatic water is primarily used to dissolve and dilute compatible substances while helping limit bacterial growth in a multi-dose vial.







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