Bacteriostatic Water

What is Bacteriostatic Water?

Bacteriostatic Water (BW) is sterile water for injection containing 0.9% benzyl alcohol as a preservative. The benzyl alcohol inhibits the growth of most microorganisms, allowing the vial to be punctured multiple times without significant risk of microbial contamination, making it the standard diluent for peptide reconstitution in research applications.

Bacteriostatic Water Specifications

Reconstitution Guidelines

Bacteriostatic Water is the recommended solvent for reconstituting lyophilised research peptides. When reconstituting peptide vials, inject the water slowly along the inner wall of the vial to avoid disrupting the lyophilised cake. Once reconstituted, store at 2–8°C and use within the peptide manufacturer’s recommended timeframe.

Why Bacteriostatic Water?

Unlike sterile water for injection (SWFI), bacteriostatic water allows for multi-dose use of reconstituted peptides due to its preservative content. This makes it ideal for laboratory protocols requiring repeated access to reconstituted peptide solutions.