Bacteriostatic water is not a peptide — it’s the solvent used to reconstitute lyophilized (freeze-dried) research peptides into solution. It’s included here because handling it correctly is part of sound laboratory practice.
What you’re reading about
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol. The benzyl alcohol is bacteriostatic — it inhibits bacterial growth — which is what lets a reconstituted vial be drawn from multiple times in a research setting, rather than discarded immediately as plain sterile water would require.
How it’s used
In the lab, a measured volume of bacteriostatic water is introduced into a vial of lyophilized peptide, dissolving the powder into a stable working solution. The volume used sets the concentration. It’s chosen specifically for its preservative property and multi-use stability.
Handling notes
Bacteriostatic water is a supporting laboratory material — its role is purely as a reconstitution medium for research compounds. See the Peptides 101 primer for how reconstitution fits into the broader research workflow.
