Bacteriostatic Water
0.9% benzyl-alcohol sterile water. Reconstitution standard.
- Safe for multi-dose storage of mixed peptides
- The standard solvent for peptide protocols
- Long shelf life when kept cool and dark
Sterile water with 0.9% benzyl alcohol as bacteriostatic preservative. Standard reconstitution diluent for lyophilized peptides.
Bacteriostatic water keeps reconstituted peptides stable for up to 30 days at refrigeration. Required for any lyophilized vial protocol.
- 1Use per peptide reconstitution instructions.
Understanding Bacteriostatic Water
Sterile water for safely mixing your peptides
Written for people new to peptides. Clear language, careful claims, no dosing instructions.
+What is Bacteriostatic Water?
Bacteriostatic water is sterile water that contains 0.9% benzyl alcohol as a preservative. It is the standard solvent used in peptide research to reconstitute lyophilized (freeze-dried) peptides into solution.
It is not a peptide and has no biological activity of its own — it exists to safely dissolve and store peptides during a research protocol.
+How Bacteriostatic Water works in the body
- The benzyl alcohol preservative inhibits bacterial growth, allowing a reconstituted vial to be re-entered safely over multiple weeks under refrigeration.
- Plain sterile water does not contain a preservative and is single-use only — which is why bacteriostatic water is the preferred solvent for multi-dose research vials.
+Benefits
- Safe for multi-dose storage of mixed peptides
- The standard solvent for peptide protocols
- Long shelf life when kept cool and dark
+Research highlights
Bacteriostatic water is a long-established pharmaceutical-grade solvent. The research community treats it as table-stakes consumable for any serious peptide work.
+What researchers commonly report
No biological reports — it is a solvent. Quality and sterility are the only meaningful variables.
+Quality markers we look for
- HPLC purity reviewed with a target of ≥99%
- Mass spectrometry identity confirmation
- LAL endotoxin screening on applicable batches
- Lyophilized (freeze-dried) format for stability
- Careful storage and handling — keep cold, reconstitute with sterile water
+Often paired with
The data your lab notebook needs.
Pulled from the verification packet included with each shipment. Cross-check the batch ID on your vial against the COA.
- Composition
- Sterile water + 0.9% benzyl alcohol
- Use
- Peptide reconstitution diluent
- Shelf life (sealed)
- 24 months
- Shelf life (opened)
- 28 days
- Purity
- Not yet published
- Source
- Not yet published
- Storage
- Room temperature. Discard 28 days after first puncture.
- Reconstitution
- n/a
- Half-life
- n/a