This listing includes one 30 mL bottle of Pfizer Bacteriostatic Water, ideal for reconstituting lyophilized peptides, human growth hormone (HGH), and other compatible medications.

Bacteriostatic Water for Injection, USP is a sterile, non-pyrogenic solution of water for injection, preserved with 0.9% benzyl alcohol (9 mg/mL) as a bacteriostatic agent. This preservative helps inhibit bacterial growth, making the product suitable for multiple withdrawals from the same vial.

It is supplied in a multiple-dose container (multi-dose vial), allowing repeated sterile access to dilute or dissolve drugs intended for injection (e.g., intravenous, intramuscular, or subcutaneous administration, per the specific drug’s instructions).

Note: For research, medical, or pharmaceutical use only, following proper sterile technique and compatibility guidelines. Always consult official prescribing information or a healthcare professional.

• Multi-Dose Convenience & Extended Usability — Unlike plain sterile water (which is single-use only), the benzyl alcohol inhibits bacterial growth, allowing safe repeated withdrawals from the same vial for up to 28 days after first puncture (when stored properly). This reduces waste and is ideal for protocols requiring multiple doses over days or weeks.
• Reduced Risk of Contamination — The preservative creates a bacteriostatic environment that prevents microbial proliferation in the vial, helping maintain sterility during storage and repeated access — critical for safe peptide or HGH use.
• Compatible & Gentle for Reconstitution — It effectively dissolves most lyophilized peptides and HGH without degrading their structure or potency when used correctly. The low concentration of benzyl alcohol is generally well-tolerated in adults for dilution purposes.
• Cost-Effective & Reliable — A trusted Pfizer product in a 30 mL multi-dose vial provides ample volume for multiple reconstitutions, making it economical for research, therapeutic, or clinical applications involving repeated dosing.

Science Breakdown

• Sterility & Preservation Mechanism — Bacteriostatic Water starts as sterile water for injection, then has benzyl alcohol added. Benzyl alcohol acts as a bacteriostatic agent: it disrupts bacterial cell membranes and metabolic processes at low concentrations, preventing reproduction without necessarily killing all bacteria immediately. This extends safe multi-use life compared to preservative-free sterile water, where bacteria can grow rapidly once the vial is opened.
• Why Not Plain Sterile Water? — Sterile water lacks preservatives, so reconstituted solutions must typically be used immediately or within 24 hours to avoid contamination and degradation. Bacteriostatic versions support longer stability (often 2–4 weeks refrigerated for many peptides), preserving peptide integrity and bioactivity.
• Safety Profile — The 0.9% benzyl alcohol concentration is standard and approved for parenteral use in adults (per USP guidelines). It’s not suitable for neonates/infants due to potential toxicity, nor for large-volume fluid replacement, epidural/spinal use, or direct IV push without proper dilution. For typical peptide/HGH reconstitution (small volumes), exposure remains minimal and safe.

Always follow sterile technique, use insulin syringes (U-100), alcohol swabs, and consult the specific peptide/HGH manufacturer’s guidelines for exact volume and dosing.

1. Prepare Your Workspace — Work in a clean area. Let vials reach room temperature (avoid direct light/heat). Swab the rubber stoppers of both the bacteriostatic water vial and the peptide/HGH vial with alcohol pads.
2. Draw Bacteriostatic Water — Use a sterile syringe. Draw air equal to the volume you plan to add (e.g., 1–2 mL common for peptides). Inject air into the water vial, then withdraw the desired amount slowly.
3. Add to Peptide/HGH Vial — Insert the needle into the peptide vial at a 45° angle. Slowly inject the water along the inner vial wall (not directly onto the powder) to minimize foaming or damage to the peptide. Gently swirl (do not shake vigorously) until fully dissolved — solution should be clear.
4. Calculate Dosing — Note the concentration (e.g., 5 mg peptide + 2 mL water = 2.5 mg/mL). Use an insulin syringe for precise micro-dosing.
5. Storage — Refrigerate the reconstituted vial at 2–8°C (36–46°F). Most stay stable 2–4 weeks; discard if cloudy, discolored, or after 28 days from reconstitution. Always use fresh sterile needles/syringes for each withdrawal/injection.

Important Notes — For research use only. Not for direct injection alone — only as a diluent. Follow your compound’s specific instructions and consult a healthcare professional. Use proper aseptic technique to avoid contamination.