Bacteriostatic Water (BAC Water)

Description

Bacteriostatic Water — commonly referred to as BAC water — is sterile, purified water containing 0.9% benzyl alcohol as a bacteriostatic preservative. Unlike standard sterile water, which must be discarded immediately after a single use, BAC water can be punctured multiple times while maintaining its sterility. This makes it the practical choice wherever repeated access to a sterile solvent is required.

Why 0.9% Benzyl Alcohol Matters

The benzyl alcohol component is what sets bacteriostatic water apart. At 9 mg/mL, benzyl alcohol works by disrupting bacterial cell membranes, preventing microbial growth from taking hold inside the vial. This means once you draw from the vial and recap it properly, the remaining solution stays protected — not just for a few hours, but for up to 28 days under normal storage conditions.

The Standard Choice for Reconstitution

BAC water is widely used to reconstitute lyophilized (freeze-dried) compounds, including peptides, growth factors, and other injectable preparations. The sterile, preservative-containing solution dissolves powdered compounds cleanly without introducing contaminants, preserving the integrity of the reconstituted solution across multiple uses.

When accuracy matters, the solvent matters. Bacteriostatic water gives you a stable, repeatable base — so you can focus on your protocol, not your prep.

Additional information

• Intended solely for research purposes.
• Not intended for human use, diagnosis, or treatment.
• Only for qualified personnel in a controlled research environment.
• By purchasing this product, you confirm that you have read these Terms of Use and agree to standard research practices.