Bacteriostatic water you can actually verify.

A sterile, non-pyrogenic solution of water containing 0.9% benzyl alcohol that acts as a bacteriostatic agent to inhibit bacterial growth. It is commonly used for the reconstitution and dilution of injectable medications and research compounds. The benzyl alcohol preservative helps maintain sterility over multiple uses when stored and handled under aseptic conditions, making it suitable for controlled multi-dose laboratory applications.

Typical reconstitution uses 2-3 mL of bacteriostatic water per medication vial. A 30 mL bottle covers roughly 10-15 vials.

Yes — every batch is tested by an independent third-party laboratory and ships with a Certificate of Analysis. We verify the identity and concentration of the benzyl alcohol preservative by RP-HPLC, sterility per USP, bacterial endotoxins by LAL assay, and pH. You can view and independently verify the current batch's COA on our /coa page. Most bac water sold online ships with no batch testing at all — that is the difference.

Sterile water has no preservative — once the seal is broken, you have hours of safe use, not days. Bacteriostatic water contains 0.9% benzyl alcohol, which acts as a bacteriostatic agent and supports multi-dose use under proper storage conditions. For multi-dose medication vials, bacteriostatic is the correct choice.

Store at controlled room temperature before opening. After first puncture, refrigerate and use within 28 days. Avoid contamination by using sterile technique during each draw — wipe the vial stopper with a 70% isopropyl swab and don't re-enter the vial with a needle that's been used elsewhere.

This product is intended strictly for laboratory research purposes. It is not approved for human, medical, or veterinary use. Only trained professionals should handle it following standard laboratory safety protocols.

Most bac water on the market is generic stock — bottled once, distributed widely, sold for whatever use case shows up. This product is third-party lab tested with a verifiable Certificate of Analysis in every box: sterile, non-pyrogenic, 0.9% benzyl alcohol, confirmed for the exact lot. The $5-10 premium pays for verification — knowing what is in the vial instead of trusting a label.