

Bacteriostatic Water 3ml Amp by Corey Pauling is a sterile, non-pyrogenic water solution containing 0.9% benzyl alcohol as a bacteriostatic preservative. It is commonly used for the reconstitution and dilution of lyophilized peptides and other injectable compounds. The addition of benzyl alcohol helps inhibit bacterial growth, making it a preferred choice for maintaining sterility during peptide preparation.
Although both solutions are sterile, Bacteriostatic Water contains 0.9% benzyl alcohol, which acts as a preservative to help inhibit bacterial growth after opening. Sterile Water contains no preservative and is generally intended for immediate use once opened. For peptide reconstitution and ongoing handling under sterile conditions, Bacteriostatic Water is often preferred due to its additional protection against contamination.
When used with bacteriostatic water, reconstituted peptides generally remain stable for approximately 14 to 28 days when stored at 2–8°C in a refrigerator. The bacteriostatic agent helps reduce bacterial growth and supports maintaining solution integrity during this period when proper sterile handling is respected.
With sterile water, reconstituted peptides are intended for immediate use or very short-term storage, typically within 24 to 72 hours when refrigerated. Without any antimicrobial preservative, the risk of contamination increases rapidly after opening.
Stability can still vary depending on the specific peptide, as some compounds degrade faster over time regardless of the diluent used.