Description
Bacteriostatic Water (BAC Water) is a sterile aqueous solution containing 0.9% benzyl alcohol, used in laboratory settings to reconstitute lyophilized peptides and research compounds. Its bacteriostatic properties inhibit microbial growth, allowing for multiple withdrawals from a single vial under proper aseptic conditions.
In peptide research workflows, BAC Water plays a critical role in maintaining compound stability and enabling consistent dosing preparation. For foundational guidance, see how to reconstitute peptides and peptide storage guidelines.
Laboratory Applications
BAC Water is the standard reconstitution medium for most lyophilized research peptides. The inclusion of benzyl alcohol allows reconstituted solutions to be stored and accessed multiple times over a defined in-use period when proper sterile technique is followed.
It is widely used across metabolic, regenerative, and signaling peptide research. However, certain compounds may exhibit sensitivity to benzyl alcohol and may require sterile water or saline depending on protocol-specific requirements.
Why BAC Water Is Used in Peptide Research
Unlike standard sterile water, bacteriostatic water contains a preservative that helps prevent bacterial growth after initial vial access. This makes it particularly useful in research environments where compounds are reconstituted once and used over multiple sessions.
This characteristic is critical in peptide research, where maintaining solution integrity and minimizing contamination risk directly impacts experimental consistency.
Product Specifications
- Composition: Sterile water with 0.9% benzyl alcohol
- Volume: 10 mL multi-dose vial
- pH: Typically 4.5–7.0
- Preservative: 0.9% benzyl alcohol (bacteriostatic agent)
- In-Use Period: Up to 28 days after first puncture (with proper aseptic technique)
- Storage: Room temperature (15–25°C), protect from freezing
- Grade: Sterile, non-pyrogenic — Research Use Only (RUO)
Related Research
Research Use Only
This product is intended strictly for laboratory research purposes. Not for human or veterinary use. No therapeutic or diagnostic claims are made.

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