Bacteriostatic Water

Bacteriostatic Water is sterile water with 0.9% benzyl alcohol added as a bacteriostatic preservative. It is the standard diluent laboratories use to reconstitute lyophilized reagents before work: the preservative suppresses microbial growth, so an opened vial stays usable for repeated withdrawals across the life of a study.

The physical form is a clear, colourless aqueous solution in a sealed vial. Every batch is quality-controlled by HPLC, with typical purity in the 98–99% range, giving stable, predictable material from vial to vial.

The full scientific detail — the mechanism of bacteriostatic action, the role of benzyl alcohol, and the physicochemical characteristics — lives in the linked wiki monograph, so this product page stays short and practical.

Store at room temperature, protect from direct light, and keep the vial tightly closed between withdrawals. For research use only (RUO): not intended for human or animal use, and not a medicinal product.