Bacteriostatic Water

Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, which inhibits bacterial growth and allows multi-dose use for up to 28 days. Sterile water for injection contains no preservative and must be used immediately after opening — any remaining solution must be discarded. For peptide reconstitution, bacteriostatic water is strongly preferred because it keeps the reconstituted solution safe for repeated access.

The most common reconstitution volumes are 1mL or 2mL per peptide vial. The exact amount depends on the peptide concentration you want to achieve. Adding 1mL to a 10mg peptide vial gives you 10mg/mL (10,000mcg/mL). Adding 2mL gives you 5mg/mL (5,000mcg/mL). Use an insulin syringe for precise dosing.

Reconstituted peptides stored in bacteriostatic water at 2–8°C (standard refrigerator) are generally stable for up to 28–30 days. Always record the reconstitution date on your vial label and discard after 28 days. Never freeze reconstituted peptides as this can compromise the solution's integrity.

Yes — bacteriostatic water is compatible with all Noveris Labs peptides. It is the universally recommended solvent for lyophilized research peptides. The low benzyl alcohol concentration is safe for use with all standard research peptides without causing degradation.

Unopened bacteriostatic water does not require refrigeration and can be stored at room temperature (15–30°C). However, once you reconstitute a peptide with BAC water, the reconstituted peptide vial should be stored in the refrigerator at 2–8°C.

Do not use bacteriostatic water if: the solution appears cloudy or discolored, you see visible particles floating in the liquid, the tamper-evident seal is broken or missing, the expiration date has passed, or more than 28 days have elapsed since first puncture. When in doubt, discard and use a fresh vial.