Bacteriostatic Water

What is Bacteriostatic Water

Bacteriostatic Water for Injection is sterile, non-pyrogenic water containing 0.9% benzyl alcohol as a bacteriostatic preservative. It is commonly used in laboratory and pharmaceutical settings as a reconstitution solvent for lyophilized (freeze-dried) compounds that require dilution before research use.

Unlike Sterile Water for Injection, bacteriostatic water contains a preservative that helps inhibit bacterial growth, allowing multiple withdrawals from the same vial when handled using proper sterile technique.

Mechanism of Action

Bacteriostatic water is not an active therapeutic compound and has no pharmacological activity of its own.

Its function is to:

• Dissolve or reconstitute lyophilized research compounds.
• Provide a sterile aqueous solution for laboratory preparation.
• Utilize benzyl alcohol (0.9%), which inhibits the growth of many common bacteria by interfering with cellular membrane function and metabolic processes, reducing contamination risk during repeated vial access.

Summary of Publicly Available Research

Published literature primarily focuses on the preservative properties and laboratory applications of bacteriostatic water rather than biological effects.

Research has demonstrated:

• Effective inhibition of bacterial contamination through benzyl alcohol.
• Broad use as a reconstitution medium for injectable medications and research materials.
• Improved usability compared with preservative-free sterile water when multiple withdrawals are required.
• Long-standing use within pharmaceutical manufacturing and laboratory research under sterile handling protocols.

Bacteriostatic water itself is not intended to produce biological activity and serves only as a preparation medium.

Key Research Areas

Researchers commonly utilize bacteriostatic water in studies involving:

• Peptide reconstitution
• Protein preparation
• Lyophilized compound dilution
• Cell biology laboratories
• Pharmaceutical formulation research
• Stability testing
• Analytical chemistry
• Method validation studies

Chemical Information

Common Name: Bacteriostatic Water for Injection

Composition:

• Sterile Water
• Benzyl Alcohol: 0.9% (9 mg/mL)

Appearance:

• Clear
• Colorless
• Odorless solution

Container Size:

• 10 mL multidose vial

Preservative:

• Benzyl Alcohol

Sterility:

• Sterile
• Non-pyrogenic

Storage Recommendations

For research use:

• Store at 20–25°C (68–77°F).
• Protect from excessive heat and direct sunlight.
• Keep vial sealed until use.
• Always use sterile laboratory technique.
• Discard if the solution becomes cloudy, discolored, or contains visible particles.
• Follow institutional laboratory procedures regarding multidose vial handling.

COA (Certificate of Analysis)

Each production lot should be accompanied by a Certificate of Analysis including applicable quality control information such as:

• Lot Number
• Manufacturing Date
• Expiration Date
• Appearance
• Fill Volume Verification
• Sterility Testing
• Endotoxin Testing (where applicable)
• Identity Verification
• Quality Control Release
• Storage Conditions

Refer to the specific COA supplied with your vial for lot-specific analytical results.

Customer Reviews

★★★★★ Excellent Quality

Crystal-clear solution with professional packaging. Perfect for research preparation.

★★★★★ Reliable Product

Consistent quality across multiple orders with secure packaging and excellent labeling.

★★★★★ Great Laboratory Supply

Easy to work with and arrived well protected. Ideal for maintaining a complete research inventory.

★★★★★ Highly Recommended

Clean presentation, reliable quality, and exactly what was expected for laboratory applications.

Frequently Asked Questions

What is bacteriostatic water used for?

It is used as a sterile diluent for reconstituting lyophilized research compounds and other laboratory materials.

What makes it “bacteriostatic”?

It contains 0.9% benzyl alcohol, which inhibits bacterial growth after repeated vial access.

Is it the same as sterile water?

No. Sterile water contains no preservative, while bacteriostatic water includes benzyl alcohol to reduce bacterial contamination during multiple withdrawals.

How should it be stored?

Store at controlled room temperature away from excessive heat and direct sunlight while maintaining sterile handling procedures.

Can the vial be accessed multiple times?

The preservative is intended to reduce bacterial growth during repeated withdrawals when proper aseptic technique is used.

Related Products

Researchers frequently pair bacteriostatic water with:

• Sterile Syringes
• Alcohol Prep Pads
• Sterile Needles
• Empty Sterile Vials
• Peptide Storage Cases
• Laboratory Refrigeration Storage Solutions
• Lyophilized Research Peptides
• Precision Laboratory Measuring Supplies

Research Use Only. Not for human consumption, therapeutic use, or diagnostic procedures.