Bac Water vs Sterile Water vs Saline
Three different solutions, three different use cases. Using the wrong one is the most common reconstitution mistake.
| Solution | Preservative | Multi-dose | Best for |
|---|---|---|---|
| Bacteriostatic Water | 0.9% benzyl alcohol | Yes, 28–30 days | Peptide reconstitution |
| Sterile Water for Injection | None | No — single use | Single-draw preparations |
| Normal Saline (0.9% NaCl) | None | No — single use | Diluting IV medications |
Bacteriostatic Water
The right choice for research peptides. The 0.9% benzyl alcohol preservative prevents bacterial contamination between draws, making the vial safe for multiple uses over 28–30 days when refrigerated.
Sterile Water for Injection
No preservative. Once the vial seal is broken, use it immediately for one draw and discard. For typical research peptide volumes (multiple smaller doses), it is not appropriate.
Normal Saline (0.9% NaCl)
Contains sodium chloride, not a benzyl alcohol preservative. Also single-use once opened. Saline is primarily used for IV dilutions and flush procedures. Default to bacteriostatic water unless a specific compound requires otherwise.
A small fraction of individuals have benzyl alcohol sensitivity. This is relevant only in human clinical contexts, not RUO research settings.
All products sold by BacVial.com are for laboratory and research use only. Not approved for use in humans or animals. Researchers are solely responsible for compliance with all applicable regulations.