BAC WATER | BAC WATER 3ML, 5ML
BAC Water is a synthesized and sterile-filtered preparation, engineered specifically for the multi-dose reconstitution of lyophilized research compounds. Each 3 mL vial of bacteriostatic water contains 0.9% benzyl alcohol acting as a preservative to suppress bacterial growth, thereby ensuring the stability of the solution throughout the entire duration of laboratory research.
BAC WATER Specifications
| Property | Value |
| Name | Selank |
| Product Type | Laboratory Reconstitution Solution / Diluent |
| Composition | BAC WATER + 0.9% (v/v) Benzyl Alcohol |
| pH | 5.7 (4.5 – 7.0) |
| Osmolarity | ~286 mOsm/L |
| Benzyl Alcohol Content | 9 mg/mL (0.9%) |
| Endotoxin Level | < 0.25 EU/mL |
| Sterility | Terminally sterilized via 0.2 μm filtration |
| Vial Size | BAC WATER 3ML |
| Packaging | Type I borosilicate glass vial with chlorobutyl stopper and flip-off seal |
BAC Water (Bacteriostatic Water)
BAC Water (Bacteriostatic Water), a sterile preparation, is a purified water containing benzyl Alcohol (C7H8O), a preservative that acts as an antimicrobial. This solution is specifically designed for lab environments. It serves as an extremely stable reconstitution for lyophilized research reagents such as proteins, peptides or lyophilized peptides. This formulation inhibits bacteria proliferation and allows for multiple samples from a vessel during in vitro workflows.
Product Overview
In biochemical and biological research, it is important to maintain the integrity of reconstituted compounds in order to guarantee reproducibility. BAC Water, an essential laboratory reagent, is designed to protect aqueous solutions from microbial contamination.
What is the role of Benzyl Alcohol?
Bacteriostatic Water is characterized by the integration of 0.9% of benzyl alchohol. The benzyl alcohol acts as a bacteriostat, a chemical agent which stops bacteria from reproducing without necessarily killing them. It interferes with bacterial cell membranes, and blocks enzymatic processes. This effectively stops the proliferation of contaminants that are introduced into routine laboratory handling.
Laboratory Applications
Before they can be used in analytical systems, tests, or models, lyophilized compounds (freeze-dried compounds) such as synthetic proteins and peptides must be precisely reconstituted. BAC Water provides a reliable aqueous media that maintains structural stability while preventing degradation of target molecules caused by microbial metabolic products.
Key features
- Formulation sterile : Preparation under strict laboratory standards, to ensure complete absence of microorganisms before sealing.
- Antimicrobial preservation: Formulated using 0.9% USP-gradebenzyl alcohol, to inhibit the growth of bacteria following container penetration.
- Improved Reconstitution medium: Ideal to dissolve lyophilized enzymes, peptides for research, and other laboratory reagents.
- Capability for Multiple Use: Allows multiple aseptic volumes to be withdrawn over a longer testing period. Minimizes waste of reagents.
- Strictly Research Designation: Explicitly produced, labeled and distributed exclusively for use in laboratory research.
What Is BAC water?
Bacteriostatic Water, also known as BAC Water, is a sterile water for injection that contains a small quantity of a preservation agent. Structure-wise, it is composed of high purity, demineralized water combined with exactly 0.9% by volume benzyl liquor.
This solution serves as a diluent and solvent for compounds, which are not intended to be consumed right away after reconstitution. In an unpreserved environment, trace contaminants or microscopic bacteria from the laboratory can multiply rapidly, degrading target peptides and proteins. The presence of a bacteriostatic agents maintains the environmental balance within the vial and keeps the solution viable to be sampled repeatedly throughout the duration of the study.
Why Researchers Use BAC Water
Modern life science research demands strict control over experiment variables. The biological contamination of delicate protein structures, synthetic peptides, and chromatography can lead to months of data collection.
Optimizing Reconstitution Workflows
In order to maintain molecular stability, peptides that are purchased by a lab arrive in a cake-like lyophilized form. The process of reconstitution involves adding a liquid to a solid peptide so that it can be used.
Researchers choose Research Use BAC Water to benefit from several distinct benefits:
- Extended Solution Viability. Unlike unpreserved drinking water which must be discarded after an event of opening a vial, the BAC water can be stored under suitable thermal conditions for up 28 days.
- The prevention of enzymatic degradation: Proliferating bacteria produce enzymes such as proteases that can cleave the peptide bonds. BAC water inhibits bacterial proliferation, protecting the primary and second structures of the peptide target from enzymatic Hydrolysis.
- Cost and Resource Efficiency – Using a multi-use product reduces the requirement to open ampoules with single-use solvents constantly, allowing for a more efficient screening process and fewer essays.
BAC Water vs Sterile Water
The design and duration for the study will determine the best laboratory reconstitution solution. Below is a table that outlines the main differences between Sterile BAC Water (BAC Water) and standard Sterile Water.
| Specification / Feature | BAC Water (Bacteriostatic Water) | Sterile Water (Unpreserved) |
| Chemical Composition | High-purity H2O + 0.9% Benzyl Alcohol | 100% High-purity H2O |
| Antimicrobial Agent | Present (Bacteriostatic) | None |
| Vial Access Parameters | Multi-use: Suitable for multiple aseptic entries over time. | Single-use: Must be discarded immediately after initial entry. |
| Maximum Storage Post-Entry | Up to 28 days (refrigerated) | 0 hours (immediate disposal required) |
| Primary Research Use | Multi-day peptide studies, sequential assays, prolonged in vitro storage. | Immediate analytical testing, PCR, sensitive cell cultures sensitive to alcohol. |
| Impact on Preservative-Sensitive Assays | Preservative may interfere with certain living cell lines or specific enzymatic assays. | Zero preservative interference; clean baseline for immediate analysis. |
Store and handle your products according to the guidelines
Researchers must follow standardized protocols when handling Laboratory Conversion Solution to ensure the sterility of the solution and its chemical integrity.
Thermal Controls
Before the initial entry, store the product at controlled temperatures (15℃ to 30℃ / 59℉ to 86℉) away direct sunlight and ultraviolet sources.
After reconstitution/post-entry: once the vial septum is breached, solution should be refrigerated (2℃ to 8℃ / 36℉ to 46℉). Do not freeze as the extreme thermal expansion could compromise the seal of the vial or affect the stability dissolved analytes.
Laboratory Best Practices
Aseptic Procedure: Before inserting each needle, wipe the rubber septum using a 70% alcohol swab.
Temporal Tracing: Write the date the first penetration occurred on the label of the vial. Any remaining solution is to be safely discarded in accordance with institutional biohazard protocols 28 days after first entry.
Frequently Asked Questions
What is BAC Water?
BAC Water is a sterile preparation of purified water containing 0.9% benzyl alcohol, utilized as a multi-dose solvent to dissolve and preserve laboratory research compounds.
What is the difference between BAC Water and Sterile Water?
BAC Water contains a bacteriostatic preservative (benzyl alcohol) that allows for multiple withdrawals over a 28-day period. Standard Sterile Water contains no preservative and must be discarded immediately after a single use.
Why is benzyl alcohol included in BAC Water?
Benzyl alcohol is included at a 0.9% concentration to serve as an antimicrobial agent. It effectively prevents the growth and replication of airborne or surface bacteria that may enter the vial during sampling.
Can BAC Water be used for all research peptides?
Most synthetic research peptides are highly stable when reconstituted with BAC Water. However, certain highly delicate proteins or alcohol-sensitive enzymes may degrade in the presence of benzyl alcohol; researchers should check compound compatibility profiles before mixing.
How to store BAC Water after opening?
Following the initial breach of the vial septum, the solution must be kept in a calibrated laboratory refrigerator at 2℃ to 8℃ (36℉ to 46℉).
Can BAC Water be frozen for long-term storage?
Freezing is not recommended for BAC Water. Freezing can cause the glass vial to fracture or stress the rubber stopper, potentially exposing the sterile solution to ambient contamination.
How long does BAC Water remain viable after opening?
When handled using strict aseptic techniques and stored under optimal refrigeration, BAC Water remains viable for laboratory use for up to 28 days post-entry.
What happens if BAC Water is kept past 28 days?
After 28 days, the efficacy of the benzyl alcohol preservative decreases below optimal thresholds, increasing the risk of bacterial contamination and subsequent peptide degradation.
Is BAC Water suitable for use in live tissue or cell culture arrays?
Because benzyl alcohol exhibits cytotoxic properties at certain concentrations, researchers must evaluate whether a 0.9% alcohol concentration will interfere with specific live cell lines or sensitive in vitro assays before deployment.
Is this product approved for human medical use?
No. This product is strictly designated as Research Use BAC Water. It is intended exclusively for laboratory-based in vitro evaluations and life science experimentation. It is not for human or veterinary diagnostic or therapeutic applications.
Scientific References
- Microbial Control Frameworks: Standards for preservative efficacy testing in multi-dose aqueous formulations. Journal of Pharmaceutical Sciences, Section 14 (Microbial Integrity).
- Peptide Stabilization Mechanics: Principles of handling, dissolving, and storing synthetic macromolecular structures in laboratory environments. International Journal of Peptide Research and Therapeutics.
- Cytotoxicity Studies on Preservative Agents: Evaluating the baseline impacts of benzyl alcohol on in vitro cell morphology and enzymatic assays. Life Science Quarterly Review.
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⚠ Intended Use
All products are intended for in vitro laboratory research use only.
They are strictly prohibited for administration to humans or animals, and must not be used for diagnostic, therapeutic, or clinical applications.
Storage and Handling
Store lyophilized powder at –20°C.
After reconstitution (for laboratory analysis), store at 2–8°C.
Avoid repeated freeze-thaw cycles.
Maintain aseptic technique during handling.





