Bacteriostatic Water

What is Bacteriostatic Water?

Bacteriostatic Water (BAC Water) is a sterile, non-pyrogenic preparation of water containing 0.9% (9 mg/mL) benzyl alcohol. The addition of benzyl alcohol acts as a highly effective preservative to inhibit bacterial growth, used as the standard diluent for reconstituting lyophilized research compounds.

At Protide Health, every order now includes a complimentary vial of BAC Water. However, for researchers requiring larger volumes or managing extensive experimental protocols, additional vials can be purchased in 10mL and 30mL options.

Key Laboratory Details

Unlike standard sterile water—which must be discarded immediately after a single use—Bacteriostatic Water is engineered for extended laboratory applications.

• Laboratory Purpose: The primary diluent used for reconstituting lyophilized (freeze-dried) research peptides, ensuring stable and consistent concentrations for in vitro and preclinical animal models.

• Composition: Sterile, non-pyrogenic water formulated with 0.9% benzyl alcohol as a bacteriostatic preservative.

• Multi-Draw Capability: The preservative formulation allows researchers to perform repeated withdrawals from the same vial for up to 28 days after the initial puncture without compromising the sterility of the remaining solution.

Handling and Storage

For optimal shelf life, store Bacteriostatic Water at controlled room temperature (20°C to 25°C / 68°F to 77°F). Once a vial has been punctured for reconstitution purposes, it should be discarded after 28 days in accordance with standard laboratory operating procedures (SOPs).

Does it need to be refrigerated after opening?

Refrigeration is not required. BAC Water is highly stable at room temperature both before and after opening. However, storing it in the refrigerator alongside reconstituted peptides is acceptable, provided the solution is never frozen. Regardless of whether it is stored at room temperature or in a refrigerator, once a vial has been punctured, it must be discarded after 28 days in accordance with standard laboratory operating procedures (SOPs).

Product Specifications