Bacteriostatic Water is a sterile water preparation containing 0.9% benzyl alcohol as a bacteriostatic preservative. Supplied in a convenient 10 mL vial for laboratory and research applications.
Sterile Preparation
Prepared as sterile water for controlled laboratory and research applications.
0.9% Benzyl Alcohol
Contains benzyl alcohol as a bacteriostatic preservative.
Convenient 10 mL Format
Convenient vial format designed for laboratory preparation and handling.
Research & Laboratory Use
Supplied specifically for qualified laboratory and research applications.
What it is for
Bacteriostatic water is water for injection with benzyl alcohol added as a preservative, typically at 0.9%. The preservative inhibits bacterial growth in the vial between withdrawals, which is what separates a multiple-dose container from a single-dose one.
It is a solvent rather than a vehicle: it carries no buffer and no tonicity agent, so whatever is dissolved in it determines the properties of the final solution. The 10mL size suits work where a smaller volume will be used up before the practical life of the vial is reached.
What ships, and what is on the certificate
The vial ships sealed as it was filled. Every compound in the catalogue is tested by an outside laboratory — Vanguard Laboratory in Olympia, Washington — and the certificate is published in full rather than summarised.
The certificate reports chromatographic purity by HPLC with the chromatogram visible, the measured quantity in milligrams, and an endotoxin result by LAL. Measured quantity usually reads slightly above the label, which is normal: fills are targeted high so every vial meets its stated content.
Frequently asked questions
Why choose the 10mL over the 30mL?
Purely a question of how much you will use. A vial that is finished sooner spends less time being re-entered, which is the main practical risk with any multiple-dose container.
Can I use sterile water instead?
You can, but it is unpreserved and single-dose. Once pierced there is nothing discouraging growth, so it suits single-use preparation rather than repeated withdrawals.
Is this a medicine?
No. It is sold for in-vitro laboratory research use only. It is not a drug, supplement or cosmetic, and is not for human or veterinary use.
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