What is Bacteriostatic Water?
Bacteriostatic Water (0.9% benzyl alcohol sterile reconstitution solution) is a Sterile water + 0.9% benzyl alcohol. Sterile water for injection containing 0.9% benzyl alcohol as bacteriostatic preservative. Safe for repeated multi-use vial puncture — benzyl alcohol inhibits bacterial growth between uses. The standard reconstitution diluent for lyophilized research peptides stored beyond same-day use.
Research Applications
Peptide Reconstitution
Standard diluent for lyophilized research peptide stock solutions
Multi-Use Vials
Bacteriostatic preservation — safe for repeated vial puncture
Stock Solutions
Stable peptide stocks at 1–5mg/mL for research protocol use
Cold Chain Compatibility
Compatible with refrigerated storage of reconstituted peptides
Quick Specs
| Form | Sterile water + 0.9% benzyl alcohol |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 7732-18-5 (Water) |
| Molecular Formula | H₂O |
| Peptide Type | Sterile Diluent / Reconstitution Solution |
| Identity | MS molecular weight confirmed — every batch |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house Fmoc SPPS — Qingdao, China |
| Storage | -20°C sealed | 2–8°C reconstituted (2–4 weeks) |
| Shelf Life | Refer to manufacturer labeling (typically 24–36 months unopened) |
Certificate of Analysis (COA)
Frequently Asked Questions
How is Vesta Bacteriostatic Water supplied?
Vesta Bacteriostatic Water is supplied as a sterile, multi-dose aqueous solution containing 0.9% benzyl alcohol as a bacteriostatic agent. Each vial is ready-to-use for peptide and protein reconstitution — no preparation required. Draw using a sterile syringe and needle under aseptic conditions.
How should Bacteriostatic Water be stored?
Store at room temperature (15–25°C) before opening. After first use, store at 2–8°C. Multi-dose vials are stable for 28 days after opening with benzyl alcohol preservation. Protect from light; do not freeze.
What is the difference between Bacteriostatic Water and Sterile Water for Injection?
Bacteriostatic Water contains 0.9% benzyl alcohol which inhibits microbial growth, allowing multiple withdrawals from a single vial over 28 days. Sterile Water for Injection is preservative-free and intended for single use only. Bacteriostatic Water is the preferred reconstitution vehicle for research peptides and proteins requiring multiple doses.
Peptide Research Tools: Use Vesta’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
Domestic shipping: USA 5–7 days
International shipping: 7–14 days