What Is Bacteriostatic Water?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative. It prevents bacterial growth in reconstituted peptide solutions, extending their usable lifespan.
Detailed Explanation
Bacteriostatic water (BAC water) is the standard reconstitution solvent for research peptides. The 0.9% benzyl alcohol content inhibits bacterial growth, allowing multi-use access to the vial over days or weeks, unlike sterile water, which must be used immediately after opening. BAC water is available in 10 mL and 30 mL multi-dose vials. For peptides that may be sensitive to benzyl alcohol (rare), sterile water or normal saline are alternatives, though these require single-use protocols. BAC water should be stored at room temperature and has a typical shelf life of 28 days after first puncture.
Related Terms
Reconstitution
Reconstitution is the process of dissolving a lyophilized (freeze-dried) peptide powder into a sterile solution for research use. Bacteriostatic water is the most common reconstitution solvent.
Lyophilization (Freeze-Drying)
Lyophilization is a preservation process that removes water from a peptide solution by freezing it and then reducing pressure to sublimate the ice directly into vapor. This creates a stable powder form.
Research & Educational Use Only
All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
The information presented here is compiled from published research studies and is intended for informational purposes only. Individual results may vary. Always consult with a licensed healthcare provider.