Comparison
BAC Water vs Sodium Chloride
A 0.9% sodium chloride solution is just saline, which means salt mixed into water. In its plain form it has no preservative. BAC water is sterile water kept safe with benzyl alcohol (a germ-fighting preservative), and it has no added salt. For peptides you draw more than once, use BAC water.
Compiled and maintained by the BACwater.ai editorial team and checked against the sources cited on this page. This is general research information, not a medical review. Last updated July 2026.
| Bac water | Sodium Chloride | |
|---|---|---|
| Also known as | Bacteriostatic water, bac water | Normal saline, 0.9% NaCl |
| Added salt | No | Yes, 0.9% sodium chloride |
| Preservative | 0.9% benzyl alcohol | None (plain form) |
| Multi-dose safe | Yes | No (plain form) |
Sodium chloride solution is saline
0.9% sodium chloride and normal saline are the same thing. So this comparison is the same as the saline one. The thing that matters for mixing peptides is whether the liquid has a preservative for many uses. Plain sodium chloride solution does not.
BAC Water vs Sodium Chloride: common questions
No. A 0.9% sodium chloride solution is saline. It has salt in it and, in its plain form, no preservative. BAC water is preserved sterile water with no added salt. BAC water is the standard choice for mixing peptides you use many times.
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References
Primary sources for the facts on this page. We cite regulatory and peer-reviewed authorities rather than secondary blogs.
- Bacteriostatic Water for Injection, USP - prescribing information · U.S. FDA labeling via DailyMed (NIH / NLM)Defines bacteriostatic water as sterile water with 0.9% benzyl alcohol added as a bacteriostatic preservative, supplied in a multiple-dose container for diluting or dissolving drugs; contraindicated in neonates.
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