Bacteriostatic water (bac water) for sale through PX1 Research is a sterile, non-pyrogenic diluent prepared with 0.9% benzyl alcohol (9 mg/mL) in USP-grade water for injection. Designed exclusively for laboratory research and reconstitution of lyophilized compounds, it prevents bacterial proliferation, enabling multi-dose sample withdrawal over extended experimental protocols.
Bacteriostatic water (bac water) for sale through PX1 Research is a sterile, non-pyrogenic diluent prepared with 0.9% benzyl alcohol (9 mg/mL) in USP-grade water for injection. Designed exclusively for laboratory research and reconstitution of lyophilized compounds, it prevents bacterial proliferation, enabling multi-dose sample withdrawal over extended experimental protocols.
In laboratory research and analytical environments, bacteriostatic water serves as a standard diluent for reconstituting lyophilized proteins, reagents, and peptides. The primary active component beyond purified water is 0.9% benzyl alcohol, an organic compound that acts as a bacteriostatic preservative. Unlike standard sterile water for injection, which contains no antimicrobial agents and must be discarded immediately after a single opening, bacteriostatic water retains microbial stability over multiple punctures when handled using aseptic protocol.
When purchasing bac water for sale, researchers must evaluate the physical and chemical specifications of the solvent. The presence of benzyl alcohol inhibits the growth of gram-positive and gram-negative bacteria, fungi, and yeasts without disrupting the molecular integrity of the reconstituted research peptide. This makes it an essential constituent of standard laboratory setups, particularly during extended time-course assays or multi-sample in vitro experiments where lyophilized matrices require gradual batch preparation.
The fundamental mechanism of bacteriostatic water relies on the lipophilic nature of benzyl alcohol. At a target concentration of 0.9% (w/v), benzyl alcohol partitions into the bacterial cell membrane, altering structural fluidity and increasing membrane permeability. This disruption leads to the leakage of critical intracellular ions, dissipation of the proton motive force, and inhibition of essential metabolic pathways. Importantly, at this standard concentration, the effect is bacteriostatic—arresting cellular replication—rather than violently bactericidal, which minimizes rapid bacterial lysis that could release intracellular contaminants like lipopolysaccharides (endotoxins) into the assay medium.
The chemical environment maintained by high-grade bac water features a tightly controlled pH range (typically 4.5 to 7.0), ensuring compatibility with sensitive amino acid sequences. In preclinical protocols involving sensitive compounds like tirzepatide or structural analogs like semaglutide, maintaining chemical stability during dissolution is critical. The low ionic strength of bacteriostatic water prevents ionic precipitation, salting-out effects, or premature protein aggregation during liquid-state storage.
Reconstitution is a critical variable in experimental reproducibility. Lyophilized powders form a porous matrix that rapidly hydrates upon contact with an appropriate solvent. When introducing bac water into a target vial containing a compound from our catalog of all peptides, researchers should direct the liquid flow against the glass wall of the container rather than directly onto the cake. Direct jetting can induce shear stress, leading to secondary structure denaturation or foam formation that complicates accurate volumetric sampling.
After introducing the specified volume of bacteriostatic water, gentle swirling or slow inversion of the vial promotes complete dissolution. Vigorously agitating or shaking reconstituted samples should be strictly avoided, as mechanical shear can disrupt delicate disulfide bonds and tertiary peptide folding. For comprehensive handling methods across diverse compound classes, consult our dedicated peptide reconstitution guide, which detail liquid dynamics, solubility limits, and optimal volume calculations for precise micro-molar concentrations.
Selecting the correct solvent depends entirely on the experimental design, duration of the assay, and stability requirements of the molecule under study. Below is a comparative overview of common laboratory diluents evaluated alongside bacteriostatic water.
While standard sterile water for reconstitution is suitable for single-use assays or immediate single-injection mass spectrometry evaluations, it lacks antimicrobial protection once exposed to ambient air or needle insertion. Conversely, normal saline (0.9% sodium chloride) provides isotonic conditions but contains high concentrations of sodium and chloride ions, which can alter the solubility of hydrophobic peptides or interfere with specific binding assays. For multi-puncture experimental workflows requiring sustained stability over 28 days under refrigerated conditions (2–8°C), utilizing high-grade bacteriostatic water 30ml or a specialized reconstitution solution kit provides the optimal balance of microbial safety, pH neutrality, and chemical inertness.
The utility of any research diluent relies on its chemical and microbiological purity. Inferior or non-grade bacteriostatic water can introduce trace heavy metals, volatile organic impurities, or bacterial endotoxins into experimental systems, confounding data and invalidating high-throughput assays. When sourcing bac water for sale online, laboratory managers must demand rigorous supplier documentation confirming that the diluent meets structural and analytical standards.
Key quality parameters for research-grade bacteriostatic water include:
1. Endotoxin Quantification: Must measure below 0.25 EU/mL verified via Limulus Amebocyte Lysate (LAL) or recombinant Factor C testing to prevent immune activation in cellular assays. 2. Benzyl Alcohol Assay: Precise HPLC/UV verification confirming 0.9% w/v (8.5–9.5 mg/mL) concentration without degradation byproducts like benzaldehyde. 3. Heavy Metals & Particulates: Zero detectable heavy metals and strict particulate limits per USP standards to prevent catalytic oxidation of reconstituted compounds. 4. Sterility Assurance: Sterilized via validated membrane filtration (0.22 µm) or terminal autoclaving, meeting ISO 17025 testing protocols.
At PX1 Research, every lot of research-grade diluent and peptide undergoes stringent analytical verification to guarantee consistency across laboratory workflows. We manufacture and package our supplies within domestic, GMP-compliant facilities adhering to ISO 9001 and ISO 17025 standards. Our internal quality assurance framework leverages advanced analytical instrumentation to ensure total batch fidelity.
Every unit of bac water offered for sale is accompanied by a accessible, lot-specific Certificate of Analysis (COA). We utilize High-Performance Liquid Chromatography (HPLC) coupled with Mass Spectrometry (MS) to verify organic purity and quantify benzyl alcohol concentrations accurately. Furthermore, lot-level endotoxin testing guarantees that our diluents remain free from pyrogenic contaminants that could interfere with sensitive cell culture or animal model studies. Researchers can access detailed technical documentation directly through our research library hub.
Proper storage conditions are vital to maintain the integrity of bacteriostatic water and the compounds dissolved within it. Sealed vials of bac water should be stored at controlled room temperature (20°C to 25°C / 68°F to 77°F) away from direct light exposure and extreme thermal fluctuations. Freezing bacteriostatic water must be avoided, as phase transitions can cause phase separation of the benzyl alcohol or compromise the container-closure seal.
Once a multi-dose vial of bacteriostatic water is punctured under aseptic conditions, the 0.9% benzyl alcohol preservative maintains microbial suppression for up to 28 days. After this 28-day window, the vial should be discarded to prevent potential contamination risks. When reconstituted with research compounds, the resulting solution should typically be stored under refrigeration at 2°C to 8°C (36°F to 46°F), depending on the specific peptide's thermal stability parameters. Always sanitize the rubber stopper with 70% isopropyl alcohol prior to each needle insertion.
Maintaining a uninterrupted supply chain of verified reagents is critical for ongoing preclinical studies. PX1 Research simplifies procurement for academic institutions, biotechnology firms, and contract research organizations (CROs). All orders ship directly from our domestic distribution centers located in California and Arizona, providing rapid transit across the United States.
Orders placed before daily cutoffs feature same-day dispatch (Monday through Friday), minimizing laboratory downtime. For institutional buyers requiring high-volume orders or recurring delivery schedules for reagents and diluents, our wholesale lab portal provides bulk pricing options, dedicated account management, and standardized lot reservation to maintain batch consistency across multi-year research projects.
What is the concentration of benzyl alcohol in research-grade bac water?
Research-grade bacteriostatic water contains exactly 0.9% (9 mg/mL) benzyl alcohol preserved in sterile, non-pyrogenic water for injection. This specific concentration effectively inhibits bacterial replication without altering the structural stability of reconstituted research peptides.
How long is bacteriostatic water stable after the initial vial puncture?
When maintained under proper aseptic handling protocols and stored at controlled room temperature, bacteriostatic water remains preserved against microbial growth for up to 28 days following the initial needle entry.
Why is bacteriostatic water preferred over sterile water for peptide reconstitution?
Bacteriostatic water contains a preservative (benzyl alcohol) that prevents bacterial growth, allowing multi-dose withdrawals over several weeks. Standard sterile water lacks preservatives, meaning it must be used immediately and discarded after a single entry to prevent contamination.
What endotoxin threshold does PX1 Research guarantee for its diluents?
All laboratory diluents and research products supplied by PX1 Research are tested to meet an endotoxin limit of less than 0.25 EU/mL, verified via Limulus Amebocyte Lysate (LAL) testing conducted in an ISO 17025 accredited laboratory.
Can bacteriostatic water be frozen for long-term storage?
No. Bacteriostatic water should not be frozen. Freezing can lead to phase separation of the benzyl alcohol preservative, alter the solution's pH, or compromise the micro-seal of the glass vial.
How does PX1 Research verify the quality of its bac water for sale?
Every lot undergoes rigorous analytical quality control, including RP-HPLC verification for benzyl alcohol content, LAL endotoxin testing, pH testing, and particulate testing. A lot-specific Certificate of Analysis (COA) is available for every batch.
Is bacteriostatic water compatible with all lyophilized research peptides?
While bacteriostatic water is compatible with the vast majority of research peptides, certain highly hydrophobic or acid-sensitive compounds may require specialized reconstitution buffers. Consult specific experimental protocols or compound documentation prior to mixing.
What are the shipping options for bulk laboratory purchases?
PX1 Research offers same-day shipping Monday through Friday for orders placed before cutoffs from our CA and AZ facilities. Institutional labs purchasing bulk quantities can access customized freight and lot-reservation options through our wholesale team.
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.