Research Compound
Hospira Bacteriostatic Water
Hospira Bacteriostatic Water is sterile water containing 0.9% benzyl alcohol as preservative, intended as a diluent for laboratory applications.
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30mL
SKU: HBA30
Batch: 202605-01-BA
$29.99
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Est. Arrival: 09/16/2026
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For Research Use Only. This product is intended for laboratory and scientific research purposes only. It is not a drug or dietary supplement and is not for human or veterinary consumption. Not intended to diagnose, treat, cure, or prevent any disease.
99%+ Purity
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Product Details
Bacteriostatic Water (USP) is sterile water preserved with 0.9% benzyl alcohol (9 mg/mL). Benzyl alcohol inhibits microbial growth, allowing multiple vial entries over extended period.
Unlike sterile water for injection (must use immediately), bacteriostatic water can be used multiple times for up to 28 days when properly stored. Isotonic with neutral pH. Store at room temperature (20-25°C); discard 28 days after first use.
Disclaimer: For laboratory use only. Not for human consumption.
Frequently Asked Questions About Hospira Bacteriostatic Water
Answers summarize published research and are provided for laboratory research purposes only.
Hospira Bacteriostatic Water is sterile water preserved with 0.9 percent benzyl alcohol, which works out to 9 mg per mL. It is supplied as a liquid diluent for laboratory use. Researchers use Hospira Bacteriostatic Water to reconstitute lyophilized peptides and proteins into solution. The benzyl alcohol preservative inhibits bacterial growth, which allows a single vial to be entered multiple times over a period of days or weeks.
The 0.9 percent benzyl alcohol in Hospira Bacteriostatic Water is a bacteriostatic preservative. It does not sterilize a contaminated solution, but it inhibits the growth of bacteria that might enter the vial through repeated needle punctures. This is what allows Hospira Bacteriostatic Water to be used as a multi-dose diluent. The concentration is low enough that it does not interfere with most peptide reconstitution in research preparation.
Both are sterile, but sterile water for injection contains no preservative and is intended for single use, so an opened vial should be used immediately and discarded. Hospira Bacteriostatic Water contains 0.9 percent benzyl alcohol, which lets the vial be re-entered multiple times over up to 28 days. For research reconstitution where a peptide vial will be drawn from repeatedly, Hospira Bacteriostatic Water is the usual choice.
The common laboratory convention is to discard an opened vial of Hospira Bacteriostatic Water 28 days after the first puncture. The benzyl alcohol preservative slows bacterial growth but does not stop it forever, and each needle entry adds a small risk of contamination. Researchers typically write the date of first use on the vial label so that the 28-day window is tracked accurately.
To reconstitute a lyophilized peptide with Hospira Bacteriostatic Water, the required volume is drawn into a sterile syringe and injected slowly down the inside wall of the peptide vial so it runs onto the powder rather than hitting it directly. The vial is then swirled gently until the powder dissolves. Shaking should be avoided because it can damage peptide chains. The result is a multi-dose research solution protected by the benzyl alcohol preservative.
Hospira Bacteriostatic Water is the standard diluent for nearly every lyophilized peptide and protein sold by Biotech Compounds, including BPC-157, TB-500, GLP-1S, GLP-2T, GLP-3R, HGH 191AA, and the Glow and KLOW blends. A small number of peptides that dissolve poorly in water are better reconstituted with Acetic Acid 0.6 percent, and the product page for each compound notes when that applies.
Hospira Bacteriostatic Water should be stored at room temperature, between 20 and 25 C, and kept away from freezing and excessive heat. It does not require refrigeration before or after opening, although keeping an opened vial in a clean, cool location is good practice. The vial should be discarded 28 days after the first use, or sooner if the solution becomes cloudy or shows any particles.
Hospira Bacteriostatic Water is isotonic and has a neutral pH, which makes it a gentle vehicle for most peptides and proteins. Its neutral pH means it does not shift the acidity of the reconstituted solution, so the peptide is dissolved in conditions close to those it was formulated for. This is one reason Hospira Bacteriostatic Water is preferred over acidic diluents unless a specific peptide requires an acidic vehicle.
Hospira Bacteriostatic Water pairs with the Easy Touch U-100 Insulin Syringe with Needle for drawing and transferring diluent, with 3ml Vial caps for sealing reconstituted vials, and with the Peptide Vial Storage Case for keeping finished solutions organized in the refrigerator. The Research Starter Kit on the site bundles these preparation items together for researchers setting up a new laboratory workflow.
Hospira is a long-established manufacturer of sterile diluents, and Hospira Bacteriostatic Water is produced to USP specifications with consistent benzyl alcohol content and sterility. Researchers who need reproducible reconstitution across many lots often prefer a named manufacturer so that the diluent is not a variable in their work. Biotech Compounds also carries a standard Bacteriostatic Water listing for researchers who do not require a specific brand.
Yes. Hospira Bacteriostatic Water is sold by Biotech Compounds strictly as a laboratory diluent for research use by qualified researchers and research organizations. Purchasers must be 21 years of age or older. It is not sold as a drug or a dietary supplement, and it is not for human or animal consumption.
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