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Bacteriostatic Water

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BACTERIOSTATICPeptides

USP-grade bacteriostatic water formulated for safe and reliable peptide reconstitution in research applications. This solution contains 0.9% benzyl alcohol to help maintain sterility and inhibit bacterial growth after opening. Designed for laboratory and research use only.

All products currently listed on this site are for research purposes only.

Original price was: $20.80.Current price is: $18.90.

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0.9

%

Benzyl Alcohol

USP preservative concentration

28

days

Multi-Use Window

After first puncture

USP

Grade

United States Pharmacopeia

100

%

Compatible

Works with all our peptides

How Bacteriostatic Water Works

The Science, Simplified

The Gold Standard for Reconstitution

Bacteriostatic Water (USP grade) is sterile water containing 0.9% benzyl alcohol. This specific concentration of benzyl alcohol acts as a bacteriostatic preservative, inhibiting the growth of most potentially contaminating bacteria.
Key insight: Unlike sterile water, which must be discarded after a single use, the preservative in BAC water allows the vial to be accessed multiple times. In research settings, this makes it the standard diluent for transforming lyophilized (freeze-dried) peptides into a stable liquid solution for study.

28-Day Multi-Use Window

Once the rubber stopper of a Bacteriostatic Water vial is punctured, the benzyl alcohol maintains the sterility of the solution for up to 28 days.

Key insight: This multi-dose capability is critical for long-term research protocols. It allows a single vial of solvent to reconstitute multiple peptide vials over a four-week period, significantly reducing research costs and waste while maintaining strict aseptic standards.

Peptide-Safe Stability

BAC water is specifically formulated to be non-pyrogenic and maintains a pH range of 4.5 to 7.0, which is compatible with the vast majority of synthetic peptides.

Key insight: The low preservative concentration ensures that the chemical structure of the peptide is not denatured or degraded during reconstitution. This stability is essential for ensuring that research results remain accurate and reproducible.

Safety & Handling from Research

Technical guidelines for laboratory use

🧿 Laboratory Handling Notes

Safety Advantage

Preservative Efficacy

  • USP Grade: Meets United States Pharmacopeia standards for purity and sterility, ensuring it is free from endotoxins and particulates.
  • Microbial Inhibition: The 0.9% benzyl alcohol effectively prevents the "bloom" of bacteria that can occur in non-preserved water within hours of exposure to air.
  • Room Temp Stability: Unopened vials are stable at controlled room temperatures (15-30°C), meaning they do not take up valuable refrigerator space until they are used to reconstitute a peptide.
  • Benzyl Alcohol Sensitivity: Some specific research models or highly sensitive peptides may be reactive to benzyl alcohol; researchers check specific peptide compatibility before use.
  • The "No Shake" Rule: When adding BAC water to a peptide vial, the water should be let to run down the side of the glass. Shaking the vial can denature the peptide proteins.
  • 28-Day Expiration: Regardless of appearance, BAC water vials are discarded 28 days after the first needle puncture to ensure maximum research safety.

Compound Information

Technical specifications for each component

🔬 Molecular Profile

What Is Bacteriostatic Water?

Common Name

BAC Water

Preservative

0.9% Benzyl Alcohol

Grade

USP (U.S. Pharmacopeia)

pH Range

4.5 – 7.0

Sterility

Non-pyrogenic / Sterile

🧊 Storage Requirements

Stability Information

Unopened Vial

Store at 15-30°C

Opened Vial

discard after 28 days.

Freezing

Prohibited.

Freezing destroys the preservative.

📊 Research Status

Development History

Classification

Research Solvent / Supply

Compatibility

100% with all catalog peptides

Manufacturing

cGMP Compliant Facility

Regulatory

For Research and Laboratory Use Only

Original discovery

Frequently Asked Questions

Common questions about Bacteriostatic Water

No. Distilled or tap water is not sterile and contains no preservatives. Using non-sterile water will introduce bacteria into your peptide vial, which will degrade the research compound within hours and could lead to contaminated results. Bacteriostatic Water is the only recommended solvent for multi-dose peptide research.
The amount depends on your desired concentration. Most researchers use 1mL or 2mL of BAC water per peptide vial. Using 1mL creates a more concentrated solution (more peptide per unit), while 2mL makes it easier to measure out very small doses accurately.
While the benzyl alcohol inhibits growth, its effectiveness can diminish over time once the seal is repeatedly punctured and exposed to air. To maintain the highest research standards and prevent any risk of microbial buildup, the 28-day rule is the industry standard for USP bacteriostatic products.
Unopened vials of Bacteriostatic Water do not need to be refrigerated and should be kept at room temperature. However, once you use the water to turn a dry peptide into a liquid, that reconstituted peptide vial must be stored in the refrigerator at 2-8°C.
Bacteriostatic Water should always be as clear as a mirror. If you see any cloudiness, discoloration, or "floaties," the vial has been compromised and should be discarded immediately. Never risk your research peptides by using a suspicious solvent.

Sources & References

Peer-reviewed research

United States Pharmacopeia

Bacteriostatic Water for Injection, USP

2024

Pollard BJ, Pomfrett CJD

View Source

International Journal of Pharmaceutics

Benzyl alcohol as a preservative in pharmaceutical formulations: efficacy and safety review

2020

View Source

Journal of Pharmaceutical Sciences

Best practices for reconstitution and storage of lyophilized peptide research compounds

2022

View Source
  • Important Research Notice

Not for human consumption. This product is sold exclusively for research and educational purposes. It is not intended to diagnose, treat, cure, or prevent any disease.

All research data and findings presented on this page are sourced from peer-reviewed journals and official publications. They are provided for educational reference only and should not be interpreted as medical advice or product claims.

By purchasing this product, you confirm that you are a qualified researcher and will use it in accordance with all applicable laws and regulations.

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