What is the difference between bacteriostatic water and sterile water?

Both are sterile, but bacteriostatic water contains 0.9% benzyl alcohol as a preservative, while sterile water for injection (SWFI) contains none. The preservative lets the same vial be punctured and drawn from repeatedly over weeks without microbial growth. SWFI is single-use — once the seal is broken there is nothing to hold back contamination.

How long does bacteriostatic water last once opened?

The benzyl alcohol preservative supports roughly 28 days of multi-draw use after the first puncture when the vial is refrigerated at 2 to 8 degrees C and the stopper is wiped before each draw. Unopened, it follows the printed expiry. Discard if the solution is ever cloudy or shows particulate.

Is bacteriostatic water legal to buy in Canada?

Bacteriostatic water is sold in Canada as a research reagent for reconstituting lyophilized research compounds for laboratory and in-vitro use. Helix North supplies it strictly as a research material, shipped domestically. It is not supplied for human or veterinary use.

Can one vial of bacteriostatic water reconstitute multiple peptides?

Yes. A multi-use bacteriostatic water vial can reconstitute several different peptide vials, provided the stopper is wiped with an alcohol prep pad before each draw and the diluent stays clear. This is why the 30 mL size is popular for labs running more than one compound.

How much bacteriostatic water do I need per peptide vial?

There is no fixed amount — the diluent volume sets the concentration (mass divided by volume). A 10 mg vial reconstituted with 2 mL gives a 5 mg/mL stock; the same vial with 4 mL gives 2.5 mg/mL. Researchers pick the volume that makes downstream draws convenient on a standard insulin syringe.

Bacteriostatic Water for Research Peptides: What It Is & How to Use It

All products are sold strictly for research purposes only. Not for human consumption. All products are sold strictly for research purposes only. Not for human consumption. All products are sold strictly for research purposes only. Not for human consumption. All products are sold strictly for research purposes only. Not for human consumption. All products are sold strictly for research purposes only. Not for human consumption. All products are sold strictly for research purposes only. Not for human consumption.