Bacteriostatic Water: preserved water for laboratory reconstitution

Bacteriostatic Water refers to a sterile aqueous solution containing a preservative intended to limit microbial growth after a container has been accessed. The term is commonly used in discussions of preserved reconstitution diluents.

Bacteriostatic is not sterilizing

A preservative may limit multiplication of certain microorganisms, but it does not correct poor aseptic technique or remove existing contamination. Clean equipment, surfaces and handling remain essential for reliable laboratory work.

Difference from sterile water

Preservative-free sterile water and preserved water are not interchangeable terms. They differ in composition, intended purpose and compatibility. Researchers should check the experimental protocol and documentation for every component before sample preparation.

What should be documented?

• solution lot and expiry
• date of first access
• volume and composition of the diluent
• storage conditions
• sample appearance and observed changes

Related laboratory material

See the Preserved Reconstitution Diluent, 3 ml.

Source

DailyMed: Bacteriostatic Water documentation

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