Bacteriostatic Water 2ml (Bac Water 2ml) is a specialized, sterile laboratory diluent formulated with 0.9% benzyl alcohol to inhibit microbial proliferation in reconstituted peptide solutions. Designed specifically for in vitro research, analytical testing, and preclinical assay preparation, this multi-dose volume provides high chemical stability while minimizing solvent waste during high-throughput laboratory protocols.
Bacteriostatic Water 2ml (Bac Water 2ml) is a specialized, sterile laboratory diluent formulated with 0.9% benzyl alcohol to inhibit microbial proliferation in reconstituted peptide solutions. Designed specifically for in vitro research, analytical testing, and preclinical assay preparation, this multi-dose volume provides high chemical stability while minimizing solvent waste during high-throughput laboratory protocols.
Bac Water 2ml (Bacteriostatic Water for Injection/Reconstitution) is a non-pyrogenic, sterile aqueous preparation containing 0.9% (9 mg/mL) benzyl alcohol added as an antimicrobial preservative. The base solvent is purified water prepared by reverse osmosis and distillation, meeting rigorous pharmacopeial standards for total organic carbon (TOC), conductivity, and particulate matter.
The 2ml vial format is specifically engineered for laboratory researchers who require precise, small-volume solvent additions without exposing larger diluent reservoirs to environmental contamination. In analytical applications, maintaining solvent purity is critical to preventing background noise, microbial enzymatic cleavage, or batch degradation during repeated sampling events.
The inclusion of 0.9% benzyl alcohol serves as a bacteriostatic agent rather than a immediate bactericidal sterilant. Benzyl alcohol functions by penetrating bacterial cell walls and inserting itself into the lipid bilayer of micro-organisms. This structural disruption increases membrane fluidity, induces leakage of essential cellular metabolites, and collapses the proton motive force required for ATP synthesis.
In preclinical laboratory workflows, this mechanism prevents Gram-positive and Gram-negative bacteria, as well as select fungal contaminants, from multiplying after a vial septum has been punctured. Because raw sterile water lacks an antimicrobial agent, any airborne micro-organism introduced during pipetting can rapidly proliferate. Bac water 2ml effectively preserves reagent integrity for up to 28 days following initial entry when stored under controlled laboratory conditions.
Lyophilized research peptides exist as highly porous, freeze-dried cakes that require gentle, non-degrading reconstitution prior to assay loading or binding studies. Using high-purity bac water 2ml ensures that fragile peptide sequences—such as BPC-157, TB-500, or Semaglutide—dissolve completely without suffering oxidation or enzymatic cleavage caused by microbial contaminants.
When performing reconstitution, researchers typically calculate target concentration (e.g., mg/mL) based on the total mass of the peptide cake and the added liquid volume. For detailed calculations and protocol adjustments across varying peptide masses, researchers frequently utilize our comprehensive peptide reconstitution calculator to ensure precise concentration math before loading micro-volumes onto analytical equipment.
Selecting the correct laboratory solvent directly impacts the shelf life, solubility, and bioactivity of reconstituted compounds. Sterile Water for Injection (SWFI) lacks preservative agents, meaning any unpreserved vial must be used immediately or discarded within a single entry window to avoid bacterial growth.
Sterile 0.9% Sodium Chloride (Normal Saline) provides isotonicity but can alter ionic strength, potentially causing salted-out precipitation of hydrophobic peptide sequences or interfering with delicate mass spectrometry readings. In contrast, bac water 2ml delivers both microbial preservation and neutral solubility for most synthetic peptides. Researchers evaluating storage parameters for diverse compounds can browse our full inventory of all peptides to review solvent compatibility notes per chemical structure.
Research-grade bac water 2ml typically exhibits a pH range between 4.5 and 7.0. This slightly acidic to neutral profile is optimal for preventing alkaline-induced base hydrolysis of peptide backbone bonds. Because benzyl alcohol is a neutral organic molecule, it does not act as a strong buffer, allowing the natural buffering capacity of the target peptide or secondary assay buffer to dictate final solution pH.
Furthermore, the osmolality of 0.9% benzyl alcohol in water is relatively low compared to hypertonic salt solutions, reducing physical stress on structural proteins during cell culture or enzymatic assay incubations. Standardized quality control testing ensures that solvent conductivity remains below baseline threshold limits, mitigating trace metal ion contamination that could catalyze peptide oxidation.
In high-throughput laboratories or low-volume reagent assays, larger 30ml diluent containers often lead to excessive unused waste or increased contamination risk over extended periods. A 2ml format allows researchers to dedicate a single vial of bacteriostatic water to a single peptide cake or short experimental batch.
By matching small peptide masses (e.g., 2mg to 10mg) with a 2ml diluent volume, scientists achieve clean concentration ratios (such as 1mg/mL or 5mg/mL) without storing large, open solvent containers on benchtop workstations. This format significantly minimizes headspace oxidation and reduces the cumulative physical degradation of the rubber septum over repeated draw cycles.
To preserve the analytical integrity of both the bac water 2ml and the target compound, strict aseptic techniques must be maintained inside a certified Class II Laminar Flow Hood or Biosafety Cabinet. The exterior of the rubber septum should be sanitized using 70% isopropyl alcohol prior to needle insertion.
When transferring bac water 2ml into a lyophilized peptide vial, direct the stream along the interior glass wall rather than spraying directly onto the peptide powder. Direct force can cause mechanical shear stress, destabilizing secondary folded structures. Allow the liquid to slow-drip down the glass, followed by gentle swirling—never vigorous shaking—until complete dissolution is visually confirmed.
Assay reliability depends entirely on solvent purity. PX1 Research enforces stringent analytical testing on every lot of bac water 2ml. Solvent purity is verified via Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) to confirm exact 0.9% benzyl alcohol concentration and ensure zero organic impurities.
Additionally, overall product safety for cell culture and preclinical evaluation is established through Limulus Amebocyte Lysate (LAL) testing, verifying that bacterial endotoxin levels remain below < 0.25 EU/mL. Full Certificate of Analysis (COA) documentation detailing lot numbers, mass spectrometry verification, and conductivity reports is available via our research hub.
PX1 Research manufactures all research compounds and specialized solvents within US-based, GMP-compliant facilities subject to rigorous ISO 17025 laboratory standards. Every batch of bac water 2ml undergoes comprehensive quality verification prior to release, ensuring freedom from heavy metals, pyrogen contaminants, and micro-particulates.
To protect inventory integrity against ambient thermal shifts, PX1 dispatches orders directly from facility hubs in California and Arizona. Institutional accounts and laboratory managers needing bulk reagent allocations can access custom fulfillment services through our wholesale program, backed by same-day shipping on orders placed Monday through Friday.
What is the concentration of benzyl alcohol in bac water 2ml?
Research-grade bac water 2ml contains exactly 0.9% (9 mg/mL) benzyl alcohol suspended in sterile, non-pyrogenic purified water.
How long is reconstituted peptide solution stable in bac water 2ml?
When reconstituted with bac water 2ml and stored at 2°C to 8°C, target peptide solutions generally maintain chemical stability and sterility for up to 28 days, depending on the specific peptide's intrinsic amino acid stability.
Can bac water 2ml be frozen after puncture?
Freezing solution containing 0.9% benzyl alcohol is generally not recommended, as phase separation can occur and freeze-thaw cycles can accelerate physical degradation of underlying peptide chains.
What is the endotoxin limit for PX1 Research bac water 2ml?
All PX1 Research reconstitution solutions are LAL tested to ensure bacterial endotoxin levels fall below < 0.25 EU/mL, making them suitable for sensitive in vitro and preclinical research applications.
Why select a 2ml vial size over a 10ml or 30ml vial?
The 2ml volume is ideal for small-scale experiments and single-peptide reconstitutions, eliminating solvent waste and reducing the risk of contamination caused by repeatedly puncturing larger multi-dose vials over extended timelines.
Is bac water 2ml suitable for human medical use?
No. PX1 Research products are strictly supplied as research-grade reagents for in vitro laboratory research, analytical testing, and preclinical experimentation. They are not for human consumption, medical treatment, or diagnostic use.
Where can I find the Certificate of Analysis (COA) for my lot?
Lot-specific COAs demonstrating HPLC purity, mass spectrometry, and endotoxin analysis can be downloaded directly from the PX1 Research hub or requested using your vial lot number.
How should unopened vials of bac water 2ml be stored?
Unopened vials should be stored at controlled room temperature (20°C to 25°C / 68°F to 77°F) away from direct sunlight and extreme thermal fluctuation.
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.