Why Choose Bacteriostatic Water?
Bacteriostatic Water for Injection is a specialized sterile water preparation that serves as the essential diluent for reconstituting lyophilized (freeze-dried) peptides. Its unique formulation makes it the preferred choice for research applications requiring multiple withdrawals from a single vial.
The History & Origins
Bacteriostatic Water for Injection (USP) was developed as a pharmaceutical-grade solvent designed specifically for parenteral use—meaning it is intended for dilution or dissolution of drugs prior to injection . It is a sterile, nonpyrogenic preparation of Water for Injection that contains 0.9% (9 mg/mL) of benzyl alcohol added as a bacteriostatic preservative . This formulation allows the water to be supplied in a multiple-dose container from which repeated withdrawals may be made . Bacteriostatic Water is a packaged form of pharmaceutical water, alongside other forms such as Sterile Water for Injection and Sterile Water for Irrigation .
How It Works: Distinct Mechanisms
Bacteriostatic Water operates through its unique combination of sterile water and a preservative agent to maintain solution integrity for research use.
Key Features
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Sterile and nonpyrogenic — meets USP standards for water for injection, ensuring it is free from microorganisms and fever-causing agents
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Benzyl alcohol preservative — contains 0.9% (9 mg/mL) benzyl alcohol, which acts as a bacteriostatic agent to inhibit the growth of bacteria after the vial is punctured
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Multiple-dose compatibility — the preservative allows for repeated withdrawals from the same vial over a period of up to 28 days when proper aseptic technique is used
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Broad pH compatibility — the solution has a pH of 5.7 (range 4.5 to 7.0), making it compatible with a wide range of research reagents
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Multi-use applications — suitable for reconstituting peptides, proteins, antibodies, and preparing working solutions from lyophilized materials
Bacteriostatic Water vs. Sterile Water: What’s the Difference?
Bacteriostatic Water is sterile water that contains a bacteriostatic preservative (benzyl alcohol). Sterile Water for Injection, in contrast, contains no bacteriostat, antimicrobial agent, or added buffer . For peptide reconstitution, bacteriostatic water is recommended over plain sterile water because the preservative keeps the solution viable for multiple uses over time . The benzyl alcohol inhibits bacterial growth, making it suitable for multi-dose applications where repeated withdrawals are required .
When reconstituting peptides, bacteriostatic water is the preferred diluent. Correctly reconstituting peptides is imperative, as improper technique can damage or even destroy delicate peptide bonds, rendering a given compound potentially inactive . The addition of bacteriostatic water to lyophilized peptide powder must be done carefully—angling the needle toward the side of the vial to allow the water to drip down and mix gently, avoiding direct injection onto the powder which can damage the peptide
Product Details
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Volume: 10 ml per vial
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Quantity: 10 vials per box
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Formulation: Sterile, non-pyrogenic, hospital grade
- As previously sold on Amazon and Ebay under Nivoura Healthcare
Important Notice
This product is supplied strictly for laboratory and research use.
Not intended for medical, clinical, or human use.
