Bacteriostatic Water is sterile water for injection preserved with 0.9% benzyl alcohol, which inhibits the growth of most common bacteria and allows the vial to be accessed multiple times without contamination. It is the standard reconstitution solvent used with lyophilized (freeze-dried) peptide research compounds. Each 10ml vial provides ample volume for reconstituting multiple peptide vials. Proper reconstitution technique — including slow injection along the vial wall to avoid foaming — is essential for maintaining peptide integrity during research preparation.