Bacteriostatic Water

BAC Water (Bacteriostatic Water) is sterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative. It is supplied in 3 ml and 10 ml glass vials for laboratory research use, primarily as a diluent for reconstituting lyophilized peptides and research compounds.

In research workflows, BAC Water is commonly used to dissolve lyophilized peptide powders into liquid form for downstream experimental work. The bacteriostatic preservative inhibits bacterial growth in multi-use vials, extending the working life of reconstituted research solutions under standard laboratory storage conditions.

Pepcore supplies BAC Water as sterile 3 ml and 10 ml vials manufactured to laboratory research grade and dispatched from the EU with fast shipping.

See also: BPC-157, TB-500 10 mg, and KPV.

Scientific Background

Bacteriostatic water is purified water (USP/EP-grade) containing 0.9% benzyl alcohol added as a preservative agent. Unlike sterile water for injection (which contains no preservative), bacteriostatic water can be used multiple times from the same vial without significant risk of bacterial contamination, making it the standard diluent in research environments where peptide vials are reconstituted and stored over multiple weeks.

The benzyl alcohol concentration is calibrated to provide antimicrobial protection without altering the chemical activity of most peptide research compounds. This balance makes bacteriostatic water the most widely used reconstitution diluent across peptide research laboratories.

BAC Water Composition

Class: Sterile diluent solution
Primary component: Water (H₂O), 99.1%
Preservative: Benzyl alcohol, 0.9%
Molecular Formula: H₂O
Molecular Weight: 18.02 g/mol
CAS Number: 7732-18-5

$21

References

• United States Pharmacopeia (USP). Bacteriostatic Water for Injection monograph.
• European Pharmacopoeia (EP). Water for Injection and bacteriostatic water specifications.
• American Pharmacists Association. Benzyl alcohol as a preservative in pharmaceutical research diluents.

Research Use Disclaimer

This product is intended for research and laboratory use only. It is designed exclusively for in vitro research purposes. All information provided is for educational and research reference only. This product is not intended for human or animal use. It is not a drug, food, or cosmetic and must not be marketed, labeled, or used as such. Use and handling are restricted to trained and qualified professionals.