Bacteriostatic Water

Bacteriostatic Water is a USP-grade research diluent / sterile solvent — sterile water preserved with 0.9% benzyl alcohol — supplied by Apex Laboratory for reconstituting lyophilized research peptides into a measured-concentration solution. For in-vitro laboratory research and development use only.

Compound Overview

Bacteriostatic water is sterile water preserved with 0.9% benzyl alcohol, which inhibits bacterial growth and allows multiple withdrawals from a single vial. It is the standard diluent used in peptide research for reconstituting lyophilized compounds while maintaining sterility over multiple uses.

Using Bacteriostatic Water for Peptide Reconstitution

Bacteriostatic water is the standard diluent for reconstituting lyophilized research peptides into a known concentration. For the full method, see our guide on how to reconstitute peptides, and use the peptide reconstitution calculator to determine mg/mL and mcg/mL from your vial mass and solvent volume. For background on the diluent itself, see what bacteriostatic water is.

Research Background & Published Literature

An essential laboratory supply for any peptide research workflow. Bacteriostatic water allows researchers to reconstitute lyophilized peptides into solution form for experimental use. The benzyl alcohol preservative maintains sterility for up to 28 days after initial puncture, unlike single-use sterile water which must be discarded after one withdrawal.

Researchers can consult the following reference for the standards governing sterile and bacteriostatic water used in laboratory reconstitution:

• United States Pharmacopeia — USP standards for sterile water

Technical Specifications

• Product Name: Bacteriostatic Water
• Classification: Research Diluent / Sterile Solvent
• Structural Description: Sterile water for injection preserved with 0.9% benzyl alcohol (USP grade)
• Physical Form: Clear sterile liquid
• Analytical Verification: Sterility, bacterial endotoxins (LAL), pH, and particulate matter — see batch Certificate of Analysis
• Intended Use: In-vitro research use only — not for human consumption

Storage, Handling & Stability Guidelines

Store at room temperature (15–30°C) away from direct light. Do not freeze. After first puncture, use within 28 days. Always use proper aseptic technique with alcohol swabs before withdrawing.

• Minimize time at ambient temperature during handling to preserve compound integrity.
• Avoid moisture exposure by resealing vials promptly after each withdrawal.
• Use appropriate personal protective equipment and follow your institution’s chemical safety protocols at all times.
• Label all aliquots with the compound name, concentration, date of reconstitution, and operator initials for complete traceability.

Quality Assurance & Analytical Verification

Apex Laboratory applies a batch-level quality protocol to bacteriostatic water before it enters inventory. Each lot is verified for sterility, bacterial endotoxins (by LAL assay), pH, and particulate matter, and confirms the 0.9% benzyl alcohol preservative content. The current batch Certificate of Analysis (batch APX-2026-0407-B, tested 2026-04-07) documenting these results is available in our Lab Verified archive.

Frequently Asked Questions

What is the difference between bacteriostatic water and sterile water?

Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, allowing multiple withdrawals over up to 28 days. Plain sterile water has no preservative and must be discarded after a single use.

How much bacteriostatic water do I need per peptide vial?

The amount depends on the desired concentration. A common research protocol is 1–2 mL per vial. Use our reconstitution calculator or contact support for specific protocol guidance.

Is this product approved for human use?

No. All compounds sold by Apex Laboratory are classified as chemical research reagents intended strictly for in-vitro laboratory research. They are not approved for human consumption, veterinary use, or any therapeutic application. Purchasers who imply intended bodily use will have their orders cancelled and accounts permanently suspended.

What documentation is available for this compound?

Each batch ships with a Certificate of Analysis reporting sterility, bacterial endotoxins (LAL), pH, particulate matter, and benzyl alcohol content. View current COAs in our Lab Verified archive or request specific batch documentation through our contact page.

Is bulk ordering available?

Yes. For bulk quantities, custom packaging requirements, or recurring supply agreements, contact our team with the compound name, desired quantity, preferred vial size, and your target delivery timeline. Volume pricing is available for qualifying orders.

Related Research Compounds

Researchers working with bacteriostatic water may also need related compounds and supplies available from Apex Laboratory, including BPC-157, Semaglutide, Acetic Acid Solution 1% (10ml). Explore our complete research catalog to browse all available peptides, reagents, and laboratory supplies, or visit our About page to learn more about our quality verification process.

Shipping, Packaging & Delivery

All orders placed before 2:00 PM Eastern Standard Time ship the same business day via tracked domestic carriers. Products are packaged in insulated, temperature-appropriate containers designed to preserve compound stability during transit. Upon delivery, transfer all materials to appropriate storage conditions immediately. For time-sensitive research protocols or special delivery requirements, contact our support team in advance to coordinate optimal shipping timing for your laboratory workflow.

Research Use Disclaimer

For in-vitro research use only. Not for human consumption. All products sold by Apex Laboratory are intended exclusively for qualified researchers, accredited laboratories, and educational institutions. Purchasers assume full responsibility for ensuring safe handling, proper storage, and compliance with all applicable federal, state, and local laws, regulations, and institutional policies governing the purchase and use of chemical research reagents.