Bacteriostatic Water

Scientific Overview

BAC Water — short for bacteriostatic water — is a sterile, USP-grade reconstitution solution supplied in a 10 mL multi-dose vial and preserved with 0.9% benzyl alcohol. In laboratory settings it is the standard solvent for reconstituting lyophilized (freeze-dried) research peptides and other powdered research compounds, turning a dry powder into a measurable, workable solution.

What separates bacteriostatic water from ordinary sterile water is the benzyl alcohol preservative. At a 0.9% concentration it inhibits the growth of bacteria, and that is precisely what allows a single vial to be entered and drawn from repeatedly over an extended period when correct aseptic technique is followed.

Composition & Format

Each vial holds a sterile, particle-free solution presented in a sealed, rubber-stopper container built for repeated access.

• 10 mL multi-dose sterile solution
• USP-grade bacteriostatic water
• 0.9% benzyl alcohol as a bacteriostatic preservative
• Rubber-stopper laboratory vial designed for multiple withdrawals

Reconstitution in a Research Context

Lyophilized peptides generally have to be reconstituted before they can be studied. In practice, BAC Water is drawn into a syringe and added slowly down the inner wall of the peptide vial, letting the powder dissolve gently without shaking or foaming. Because the solution is bacteriostatic, one vial can support several reconstitutions across the life of a research project rather than being discarded after a single use. Researchers should always follow appropriate laboratory handling and aseptic procedures when preparing experimental solutions.

Manufacturing & Analytical Testing

The current third-party lab report for this product is available in the COA tab.

Storage & Handling

Store at controlled room temperature, 20°C to 25°C (68°F to 77°F). Protect the vial from excessive heat, strong light, and freezing to maintain stability. Keep the stopper sealed between uses and handle only under clean, aseptic conditions.

Also Known As

BAC Water may appear in research and laboratory literature under several names, including bacteriostatic water, bacteriostatic water for injection, BWFI, 0.9% benzyl alcohol water, and multi-dose reconstitution solvent.

Purebred Peptides supplies BAC Water as a laboratory reconstitution solution intended strictly for scientific and research use. This product is not a drug and is not for human or veterinary use; it is not intended to diagnose, treat, cure, or prevent any disease.