Product Name: Bac.water (Bacteriostatic Water for Injection) CAS Number: 7732-18-5 Category: Sterile solvent; pharmaceutical-grade diluent Form: Clear, colorless liquid in sealed glass vials Composition: Purified water with 0.9% benzyl alcohol (antimicrobial preservative) pH: 5.7-7.0 (buffered for stability) Sterility: Aseptically processed; pyrogen-free (<0.25 EU/mL)
🔍 Key Properties
Physical Characteristics:
Density: 1.00 g/mL at 25°C
Osmolality: ~280 mOsm/kg
Boiling Point: 100°C (same as pure water)
Storage Stability:
Unopened vials: 2-25°C for 36 months (protected from light)
After first use: Refrigerate (2-8°C) and use within 28 days
Supply Specifications: Available in 3mL, 5mL, 10mL, and 30mL vials; 10 vials per box
🧪 Primary Applications
Bac.water serves as a specialized diluent in research and pharmaceutical settings:
Peptide Reconstitution: Dissolves lyophilized peptides (e.g., ARA-290, Thymalin) for in vitro studies or animal injections
Biological Sample Preparation: Dilutes enzymes, antibodies, and cell culture reagents
Drug Formulation: Used in small-scale compounding of injectable solutions (research use only)
Hydration Control: Maintains osmotic balance in cell-based assays
⚙️ Mechanism of Action
Antimicrobial Preservation: Benzyl alcohol (0.9%) inhibits bacterial growth by disrupting cell membranes, allowing multiple withdrawals from a single vial without contamination
Solvent Properties: High dielectric constant enables dissolution of polar and ionic compounds
Isotonicity: Mimics physiological osmolarity to prevent cell lysis or shrinkage
📋 Handling & Safety
Reconstitution Guidelines:
Slowly inject Bac.water into lyophilized powder vials to avoid foaming
Gently swirl (do not shake) to ensure complete dissolution
Allow solution to reach room temperature before use
Safety Considerations:
For laboratory/research use only (not for human or animal clinical use)
Avoid contact with eyes; flush with water if exposed
Dispose of unused solution as biohazardous waste
📦 Packaging & Logistics
Container: Type I borosilicate glass vials with butyl rubber stoppers and aluminum seals
Transport: Ambient temperature shipping (20-30°C); no special cold chain required
Regulatory Status: Complies with USP <797> and EP sterility standards for non-clinical use
⚠️ Critical Distinction
Bac.water is not the same as sterile water for injection (SWFI):
None of our HGH lines are inherently better than the other. Each batch comes with a corresponding test report. Purity and dimer can be a decent proxy for “quality”, you want purity as high as possible and dimer as low as possible. The main factor to consider in our opinion, is the price per IU. Supreme is usually the best bang for buck option. Historically, Supreme & Deluxe have shown lower dimer content, although this may not always be the case, so of course reference the corresponding test reports.
For HGH, we typically recommend 1ml for every ~10 IU in the vial. If a batch tests at an average of 290 IU per kit, that is an average of 29 IU per vial, and we’d recommend 2.9ml of bacteriostatic water. This will make the syringe math similar to a traditional 100 iu kit with 1ml of solution For peptide reconstituion, you can use our amazing Dosage Calculator.
Not necessarily. If you look through all our lab reports, particularly the ones with multiple test reports in a single batch, you will see that the intra-batch variance can actually be quite high. When you purchase a batch, you can expect some of the vials in your kit to be as much as 5-15% +/- whatever the corresponding lab test reflects. This is simply the reality of product that is not made to the same standards as pharmaceutical grade growth hormone. To state otherwise would be disingenous. There can also be a high variance in the dimer content intra-batch. (For Example: Economy B, Deluxe A, etc) Over time, we’ve increased the volume of samples analyzed for each batch, to provide more transparancy regarding the potential for intra-batch variance. If you use the average IU figure provided on each product, your dosage should average out over time, so don’t overthink your administration protocol too much. We know it can be a bit overwhelming with all the different numbers provided. That said, don’t hesitate to reach out if you need specific guidance on dosage or reconstitution.
Yes! We offer store credit for quantitative testing of total IU/Purity (ie Janoshik testing), and for personal IGF-1 test results. Please email for more information. *TERMS APPLY*
Depending on your location, most customers receive their order in 2-10 business days. We ship with USPS Ground Shipping, from the United States only. 99% of orders ship within 24 hours (excluding weekends & holidays)
We are no longer providing tracking. If your order is over 10 business days old and hasn’t arrived, our customer service team can check your tracking information to see the status of your package
If your order was marked as “completed”, typically this means a label has been generated and your order is scheduled to go out that day or the next. “Processing” status orders have not been shipped, processing means payment has been confirmed successfully. Don’t hesitate to reach out regarding the status of your order.
Unfortunately we do not provide reships for incorrect addresses. In the VERY rare instance that a package is lost in transit, we will reship your order free of charge.
