BAC Water (with Benzyl Alcohol)

There is no peptide in this vial; it is the solvent that makes the rest of the catalogue workable. Bacteriostatic water is sterile water carrying benzyl alcohol as a preservative, conventionally at 0.9%, and benzyl alcohol is bacteriostatic rather than bactericidal — it holds bacterial multiplication in check rather than killing outright, which is what lets a vial be entered repeatedly instead of being discarded after one draw. With a diluent the technique is the product: swab the stopper before every entry, run the water slowly down the inner wall onto the lyophilised cake rather than jetting it into the powder, swirl until fully dissolved without ever shaking, and write the date on the vial. Reconstituted peptide solutions go back to 2–8°C protected from light, and a preserved multi-entry vial is conventionally retired 28 days after first puncture. Check each compound's own data before assuming compatibility — some protocols specify a preservative-free diluent — and note that this item, like everything else here, is supplied for in-vitro laboratory research only, not for human or animal consumption.