Research Compound
Bacteriostatic Water
Bacteriostatic Water is sterile water containing 0.9% benzyl alcohol as preservative, intended as a diluent for laboratory applications.
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3mL
SKU: BA3
Batch: 202601-01-BA
$9.99
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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 Bacteriostatic Water
Answers summarize published research and are provided for laboratory research purposes only.
Bacteriostatic Water is sterile water preserved with 0.9 percent benzyl alcohol, equal to 9 mg per mL. It is supplied as a liquid diluent for laboratory applications, most commonly for reconstituting lyophilized research peptides. The benzyl alcohol content inhibits bacterial growth, which allows a single vial of Bacteriostatic Water to be entered multiple times over a period of days.
The 0.9 percent benzyl alcohol in Bacteriostatic Water acts as a bacteriostatic preservative. It does not sterilize the contents, but it stops bacteria that may enter the vial from multiplying. This is what makes Bacteriostatic Water suitable for multi-dose vials where the stopper is punctured repeatedly during research preparation, in contrast to plain sterile water that must be used immediately.
Sterile water for injection contains no preservative and is meant for single use, because once opened it offers no protection against microbial growth. Bacteriostatic Water contains 0.9 percent benzyl alcohol, so an opened vial can be used for multiple withdrawals. For reconstituting research peptides that will be drawn from over several days, Bacteriostatic Water is the standard laboratory choice.
In laboratory preparation, a measured volume of Bacteriostatic Water is drawn into a sterile syringe and injected slowly down the inside wall of the peptide vial rather than directly onto the powder. The vial is then swirled gently until the powder dissolves completely. Shaking is avoided because it can damage delicate peptide chains. Bacteriostatic Water pairs with every lyophilized peptide sold on the site.
The common laboratory convention is to discard an opened vial of Bacteriostatic Water 28 days after the first puncture. The benzyl alcohol keeps bacterial growth in check during that window, but the preservative is not designed for indefinite use once the seal has been broken. Writing the date of first use on the vial label is a simple way to track this.
Bacteriostatic Water should be stored at controlled room temperature, 20 to 25 C, away from direct light. It should not be frozen, and the vial should be kept upright with the stopper protected from contamination. After the first use, Bacteriostatic Water may remain at room temperature, but the 28 day discard convention still applies. Any vial showing cloudiness or particles should not be used.
Bacteriostatic Water is the recommended diluent for nearly every lyophilized peptide sold by Biotech Compounds, including BPC-157, TB-500, GHK-Cu, and the GLP class peptides. A small number of peptides dissolve poorly in water and are better prepared with Acetic Acid 0.6 percent, which is also available on the site. The product page for each peptide notes the preferred diluent.
Bacteriostatic Water is isotonic and has a neutral pH. These properties make it a gentle vehicle for peptides that can be sensitive to acidic or basic conditions during reconstitution. Because the solution is isotonic, it does not introduce osmotic stress into prepared research solutions, and the neutral pH helps preserve the structure of most peptides in the catalog.
Both products are sterile water preserved with 0.9 percent benzyl alcohol and serve the same purpose in research preparation. Hospira Bacteriostatic Water is the branded pharmaceutical grade product from that manufacturer, while the standard Bacteriostatic Water listing is the general USP grade diluent. Researchers who need a specific brand for documentation can choose the Hospira listing; otherwise both function identically.
Bacteriostatic Water is typically used alongside the Easy Touch U-100 Insulin Syringe with Needle for drawing and transferring the diluent, sterile 3ml vial caps for sealing prepared vials, and the Peptide Vial Storage Case for keeping reconstituted vials organized in the refrigerator. The Research Starter Kit on the site bundles the core preparation supplies together.
Yes. Bacteriostatic Water from Biotech Compounds is sold 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 a drug or a dietary supplement, and it is not intended for human or animal consumption.
