Bacteriostatic water 2ml serves as a critical sterile diluent engineered for precise reconstitution and stability in laboratory research applications. Formulated with 0.9% benzyl alcohol to inhibit bacterial proliferation, this vehicle maintains lot-to-lot consistency during multi-dose benchtop assays. PX1 Research supplies high-purity, laboratory-grade reconstituting media backed by independent analytical verification and lot-specific documentation.
Bacteriostatic water 2ml serves as a critical sterile diluent engineered for precise reconstitution and stability in laboratory research applications. Formulated with 0.9% benzyl alcohol to inhibit bacterial proliferation, this vehicle maintains lot-to-lot consistency during multi-dose benchtop assays. PX1 Research supplies high-purity, laboratory-grade reconstituting media backed by independent analytical verification and lot-specific documentation.
Bacteriostatic Water 2ml is a sterile, non-pyrogenic preparation of water for injection containing 0.9% (9 mg/mL) benzyl alcohol added as a bacteriostatic preservative. Designed specifically for laboratory research, it enables the solubilization and multi-dose retrieval of lyophilized compounds by inhibiting bacterial proliferation over extended experimental windows.
In analytical and in vitro research environments, maintaining the integrity of reconstituted reagents is vital. When opening a standard single-use diluent container, atmospheric micro-organisms can compromise the solution upon repeated sampling. The addition of 0.9% benzyl alcohol provides continuous antimicrobial activity against common Gram-positive and Gram-negative bacterial contaminants, allowing investigators to draw multiple aliquots from a single 2ml vial over a multi-day testing protocol without risk of microbial overgrowth.
PX1 Research provides bacteriostatic water 2ml manufactured in compliance with strict quality management standards, providing researchers with a dependable, standardized vehicle for preparing research compounds, reference standards, and assay reagents across diverse preclinical models.
The formulation of 2ml bacteriostatic water relies on ultra-pure, deionized water for injection (WFI) as the primary solvent, combined with high-grade benzyl alcohol ($C_7H_8O$) at a fixed concentration of 0.9% w/v. The pH of the solution is carefully adjusted during manufacturing (typically ranging between 4.5 and 7.0) to optimize chemical stability and ensure compatibility with a wide spectrum of synthetic peptides, proteins, and small molecules.
Benzyl alcohol exerts its bacteriostatic effect primary by disrupting bacterial cell membrane permeability and fluidity. At the 0.9% concentration, the organic alcohol alters lipid-lipid interactions within the prokaryotic cytoplasmic membrane, inducing ion leakage and neutralizing the proton motive force required for ATP synthesis. Because this mechanism targets cellular metabolic maintenance rather than cell wall lysis, it prevents bacterial replication without causing abrupt cell lysis that could release intracellular endotoxins into the research vehicle.
It is essential for investigators to recognize the distinction between bacteriostatic and bactericidal agents in laboratory workflows. While bactericidal solvents actively destroy existing bacterial populations, a bacteriostatic medium prevents population growth and maintains a static microbial count. Consequently, bacteriostatic water must be prepared using sterile processing procedures to ensure that initial bioburden remains below detectable thresholds prior to seal closure.
In preclinical laboratory settings, lyophilized biomolecules require controlled reconstitution to preserve secondary and tertiary structural integrity. Reconstitution protocols typically involve introducing a calculated volume of 2ml bacteriostatic water down the internal glass wall of the reagent vial to prevent mechanical shear stress. Allowing the diluent to passively hydrate the cake minimizes protein denaturation and aggregation.
Investigators utilize 2ml bacteriostatic water when working with research compounds intended for multi-day in vitro assays, cell culture treatments, or microfluidic testing. For instance, when reconstituting compounds such as BPC-157 or TB-500, maintaining a sterile environment across successive sampling events is mandatory to prevent confounding experimental data with bacterial lipopolysaccharides (LPS) or enzymatic degradation.
For detailed mathematical calculations involving volumetric dilution, stock concentration determination, and aliquot partitioning, researchers can reference our comprehensive peptide reconstitution calculator guide. Utilizing precise mathematical modeling ensures reproducible molar concentrations across all analytical procedures.
Selecting the correct solvent is critical for maintaining compound solubility and avoiding unwanted chemical interactions during benchtop studies. Laboratory researchers routinely evaluate several standard media depending on the specific requirements of the assay protocol.
Bacteriostatic water 2ml differs significantly from alternative vehicles such as single-use sterile water for injection, phosphate-buffered saline (PBS), and deionized water. While sterile water lacks antimicrobial agents and must be discarded immediately after a single entry, bacteriostatic water supports multi-entry sampling protocols due to its 0.9% benzyl alcohol content. Conversely, phosphate-buffered saline provides ionic strength and pH buffering capacity, making it preferable for specific biochemical assays where osmotic pressure must be maintained, though PBS lacks built-in bacteriostatic protection against long-term ambient contamination. Deionized water is strictly reserved for non-sterile chemical preparation and analytical chromatography, as it lacks both sterility and antimicrobial preservation.
Evaluating chemical compatibility is paramount prior to reconstitution. Certain highly sensitive biomolecules or enzymatic assays may exhibit altered kinetics or conformational changes in the presence of benzyl alcohol. In such specialized cases, researchers should consult the specific compound literature within our complete research peptides hub to determine whether a bacteriostatic vehicle or an unpreserved sterile diluent is required.
Proper handling and storage of 2ml bacteriostatic water are necessary to prevent degradation of the preservative and maintain container closure integrity. Unopened vials should be stored at controlled room temperature ($20^\circ\text{C}$ to $25^\circ\text{C}$ or $68^\circ\text{F}$ to $77^\circ\text{F}$), protected from direct light exposure and excessive thermal fluctuations.
Once the vial septum has been punctured under a laminar flow hood, the multi-dose container should typically be used within a 28-day window when stored under refrigerated conditions ($2^\circ\text{C}$ to $8^\circ\text{C}$). Repeated sampling with sterile needles must follow strict aseptic technique. Standard operating procedures dictate wiping the chlorobutyl rubber stopper with 70% isopropyl alcohol prior to each entry to eliminate surface particulates.
Freezing 2ml bacteriostatic water is strongly disadvised. Freezing can cause volumetric expansion of the aqueous solution, potentially compromising the glass vial wall micro-structure or breaking the seal integrity of the crimped aluminum cap. Furthermore, phase separation during freezing may alter the local concentration of benzyl alcohol, leading to inconsistent antimicrobial protection upon thawing.
Bacterial endotoxins—specifically lipopolysaccharides derived from the outer membrane of Gram-negative bacteria—pose a major threat to the validity of in vitro and animal model research. Exposure to trace endotoxin levels can trigger unspecific inflammatory cascades, alter receptor expression, and invalidate experimental cell culture controls.
To ensure experimental fidelity, PX1 Research subjects every production lot of 2ml bacteriostatic water to rigorous Limulus Amebocyte Lysate (LAL) testing per USP <85> guidelines. Our acceptance criteria enforce strict endotoxin thresholds (typically $< 0.25\text{ EU/mL}$), ensuring that the diluent introduces zero background interference into sensitive immunological, enzymatic, or receptor-binding assays.
In addition to endotoxin quantification, raw materials and finished containers undergo strict bioburden screening, particulate matter testing, and heavy metal screening. Securing research-grade media manufactured under these stringent parameters protects downstream data from artifactual distortion.
Quality control at PX1 Research extends beyond simple physical sterility. Every batch of bacteriostatic water is subjected to analytical testing in an ISO 17025-accredited laboratory using Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) and Mass Spectrometry (MS).
Chromatographic evaluation verifies the exact concentration of benzyl alcohol, confirming it remains precisely at the target 0.9% w/v specification without degraded organic byproducts or unexpected chemical peaks. Mass spectrometry further confirms the absence of trace organic contaminants or leaching compounds from container-closure materials.
Every unit shipped to research institutions includes access to a lot-specific Certificate of Analysis (COA). Researchers evaluating high-throughput screens or quantitative assays can inspect COA documentation to verify identity, purity percentages, pH parameters, and low-endotoxin compliance prior to initiating benchtop work.
Sourcing consistent, research-grade reagents is a foundational requirement for reproducible science. Substandard diluent vehicles sourced from unverified suppliers frequently suffer from variable benzyl alcohol concentrations, particulate contamination, or missing lot traceability.
PX1 Research manufactures all research compounds and diluents within GMP-compliant facilities located exclusively in the United States. Operating state-of-the-art laboratory centers in California and Arizona, we maintain complete oversight across raw material testing, sterile filtration, automated filling, and final packaging.
Orders placed before daily cutoffs receive same-day dispatch Monday through Friday from our CA and AZ logistics hubs. This domestic supply chain model eliminates international customs delays, cold-chain risks during extended transit, and lot-to-lot variance. Principal investigators establishing long-term study protocols can utilize our wholesale lab account portal to secure dedicated batch allocations and standardized vehicle lots for multi-phase projects.
What is the primary role of 0.9% benzyl alcohol in 2ml bacteriostatic water?
The 0.9% benzyl alcohol acts as a bacteriostatic preservative. It disrupts bacterial cell membrane function and prevents microbial replication, allowing researchers to repeatedly sample from the 2ml vial over multi-day laboratory protocols without contaminating the solution.
How does 2ml bacteriostatic water differ from sterile water for injection?
Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, making it suitable for multi-dose applications in laboratory research. Sterile water for injection lacks preservatives and is designated for single-use applications; any remaining solution must be discarded immediately after unsealing.
What is the recommended storage temperature for 2ml bacteriostatic water?
Unopened vials should be stored at controlled room temperature (20°C to 25°C / 68°F to 77°F) away from direct light. Once punctured, the vial should be stored under refrigeration (2°C to 8°C) and used within 28 days for optimal laboratory stability.
Can 2ml bacteriostatic water be frozen for long-term storage?
No, freezing is not recommended. Freezing can compromise the integrity of the glass vial, disrupt the crimped vial stopper seal, and cause phase separation of the benzyl alcohol, leading to inconsistent preservative performance upon thawing.
What endotoxin limits apply to PX1 Research bacteriostatic water 2ml?
Every lot of PX1 Research bacteriostatic water is verified via LAL assay testing to meet endotoxin levels below 0.25 EU/mL, ensuring it will not introduce lipopolysaccharide interference into preclinical or cell culture research.
Is a Certificate of Analysis (COA) provided with 2ml bacteriostatic water?
Yes. Every lot of bacteriostatic water 2ml provided by PX1 Research includes a lot-specific COA detailing HPLC purity testing, benzyl alcohol assay quantification, pH readings, and endotoxin verification from an ISO 17025 accredited laboratory.
Can bacteriostatic water be used to reconstitute all research peptides?
Most lyophilized research peptides and proteins are compatible with bacteriostatic water. However, certain benzyl alcohol-sensitive enzymes or specific cell line assays may require unpreserved sterile water or buffer solutions. Researchers should check individual compound guidelines in our research library before reconstitution.
How long is a punctured 2ml bacteriostatic water vial viable in the laboratory?
Under standard laboratory operating procedures and proper aseptic handling, a punctured vial maintained at 2°C to 8°C remains viable for up to 28 days before disposal is recommended.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.