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It depends on why you need them

It's intended for single-dose reconstitution: open the seal, draw out what you need, discard the remainder

Both words refer to the same thing and function in precisely the same manner

Takeaways Bacteriostatic water contains 0.9% benzyl alcohol preservative enabling multi-dose use for up to 28 days Sterile water provides maximum purity but requires single-use within 24-48 hours after opening Cell culture applications typically require sterile water due to benzyl alcohol cytotoxicity concerns Choice depends on experimental timeline, peptide sensitivity, and whether preservatives interfere with assays What is Bacteriostatic Water for Peptides