USP-Grade Bacteriostatic Waterfor Research Laboratories
Sterile aqueous diluent with 0.9% benzyl alcohol preservative — the standard laboratory solvent for preparing lyophilized peptide solutions with documented sterility and batch-specific COA.
CAS: 7732-18-5 (water); contains 0.9% benzyl alcohol (CAS 100-51-6) as preservative
Bacteriostatic water from MiPeptidos is intended for laboratory research purposes only. Not for human consumption, injection, or clinical use. Handle with appropriate laboratory safety precautions.
What Is Bacteriostatic Water?
Bacteriostatic water for injection is sterile water containing 0.9% benzyl alcohol (C₇H₈O) as a bacteriostatic preservative. In research laboratories, it serves as the primary aqueous diluent for dissolving lyophilized (freeze-dried) peptide powders into working stock solutions.
The benzyl alcohol preservative inhibits microbial proliferation after the vial septum is punctured, enabling multi-draw access from a single vial over an extended period — a critical requirement when preparing multiple peptide solutions from one supply container.
Unlike single-use sterile water, bacteriostatic water maintains solution integrity across repeated laboratory withdrawals, making it the preferred diluent for multi-dose research vial preparation and peptide solubilization workflows.
Bacteriostatic Water vs. Sterile Water
A scientific comparison of the two primary aqueous diluents used in peptide research laboratories.
| Characteristic | Bacteriostatic Water | Sterile Water for Injection |
|---|---|---|
| Preservative | 0.9% benzyl alcohol | None |
| Multi-draw vial use | Yes — preservative inhibits contamination | No — single-use, discard remainder |
| Post-opening stability | Up to 28 days (preservative-protected) | Immediate use required |
| Primary research application | Lyophilized peptide solubilization, multi-dose prep | Single-dose preparations, immediate assays |
| Storage (unopened) | Room temperature (15–25°C) | Room temperature (15–25°C) |
Product Specifications
Specifications
Quality & Documentation
Every MiPeptidos bacteriostatic water vial is accompanied by batch-specific documentation confirming sterility, endotoxin levels, and preservative concentration — giving your laboratory full traceability from receipt to use.
Sterility Testing
Each batch passes USP <71> sterility testing with documented results included in your COA.
Endotoxin Screening
LAL endotoxin testing confirms levels below 0.1 EU/mg — suitable for sensitive research applications.
Certificate of Analysis
This COA is a representative sample. A batch-specific Certificate of Analysis with full HPLC chromatograms and mass spectrometry data is included with every order.
Pairs With Your Research
Bacteriostatic water is the standard diluent for these popular research peptides — order together for a complete laboratory supply.
Why MiPeptidos Bacteriostatic Water
USP-Grade Formulation
Manufactured to United States Pharmacopeia standards with verified 0.9% benzyl alcohol preservative concentration and clear, particulate-free solution.
Batch-Specific COA
Every shipment includes a Certificate of Analysis with sterility results, endotoxin levels, and preservative verification for full laboratory traceability.
Same-Day Shipping
Orders placed before cutoff ship the same business day. Free shipping on orders over $200 with discreet, tracked packaging.
Frequently Asked Questions
Bacteriostatic water from MiPeptidos is intended for laboratory research purposes only. Not for human consumption, injection, or clinical use. Handle with appropriate laboratory safety precautions.
Stock Your Laboratory
USP-grade bacteriostatic water with batch COA — available in 3mL and 10mL vials.