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Bacteriostatic Water 10ml - Research Peptide
Supplies 10ml

Bacteriostatic Water

$15.00 In Stock

Sterile bacteriostatic water with 0.9% benzyl alcohol for peptide reconstitution.

≥98%
HPLC Purity
COA
Included
USA
Based Supplier

Description

Sterile bacteriostatic water with 0.9% benzyl alcohol for peptide reconstitution.

Bacteriostatic water (BAC water) is sterile water for injection preserved with 0.9% benzyl alcohol, which inhibits bacterial growth and allows for multiple entries into the same vial without contamination. The benzyl alcohol acts as a bacteriostatic agent by disrupting microbial cell membrane integrity, preventing proliferation of microorganisms that may be introduced during repeated needle punctures. This distinguishes it from sterile water for injection, which contains no preservative and must be used immediately upon opening. According to United States Pharmacopeia (USP) standards, bacteriostatic water must meet stringent purity requirements including endotoxin limits below 0.5 EU/mL and sterility testing per USP Chapter 71. The 0.9% benzyl alcohol concentration has been established through research as the optimal balance between effective bacteriostasis and compatibility with injectable preparations. Studies in the American Journal of Health-System Pharmacy have characterized benzyl alcohol's antimicrobial efficacy, showing effective inhibition of common environmental contaminants including Staphylococcus aureus and Escherichia coli. Compared to sterile water for injection (single-use, no preservative) and normal saline (0.9% NaCl), bacteriostatic water is the standard reconstitution vehicle for lyophilized peptides in research settings because it permits multi-dose use from a single vial over up to 28 days. Sterile water should be used when benzyl alcohol is contraindicated for specific assay systems. Normal saline is sometimes preferred when isotonicity of the reconstituted solution is critical. Store unopened bacteriostatic water at controlled room temperature (20-25°C). Once punctured, keep refrigerated at 2-8°C and discard after 28 days per USP guidelines. Bacteriostatic water is essential for any peptide research laboratory and is used by biochemists, pharmacologists, and all researchers working with lyophilized peptide preparations.

This product is supplied as a lyophilized powder and is intended for laboratory and research use only. Not for human consumption. Each vial contains 10ml of research-grade material.

Research Applications

  • Peptide reconstitution
  • Sterile laboratory preparation
  • Multi-use vial applications

Specifications

Size
10ml
Purity
≥98% (HPLC)
Form
Lyophilized Powder

Storage & Handling

  • Long-term storage: -20°C in a sealed, light-protected container
  • Short-term storage: 2-8°C (refrigerated) for up to 30 days
  • Reconstituted: Store at 2-8°C and use within 30 days
  • Avoid: Repeated freeze-thaw cycles, direct sunlight, and moisture exposure
  • Reconstitution: Use bacteriostatic water or sterile water for injection

Frequently Asked Questions

What is Bacteriostatic Water and what is it used for?
Bacteriostatic Water (BAC water) is sterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative. The benzyl alcohol inhibits microbial growth, allowing the water to be used for multiple withdrawals from the same vial over an extended period. It is the standard diluent for reconstituting lyophilized (freeze-dried) peptides and other research compounds in laboratory settings.
What makes Bacteriostatic Water different from Sterile Water?
The key difference is the 0.9% benzyl alcohol preservative. Sterile Water for Injection contains no preservative and must be used immediately after opening as a single-use product. Bacteriostatic Water's preservative allows repeated needle punctures and withdrawals over up to 28 days without microbial contamination. For peptide research involving multiple aliquots from a reconstituted vial, BAC water is the preferred choice.
How does Bacteriostatic Water compare to Sodium Chloride 0.9% for reconstitution?
Both are acceptable diluents, but they serve different purposes. Bacteriostatic Water is the default choice for most peptide reconstitutions due to its multi-use preservative. Normal Saline (0.9% NaCl) may be preferred for peptides that are sensitive to benzyl alcohol or for specific experimental protocols requiring isotonic solutions. Some peptides, particularly for intranasal delivery research, may perform better in saline vehicles.
What is the proper storage and handling protocol for Bacteriostatic Water?
Store unopened vials at room temperature (15-30°C) in the original packaging, protected from light. After first puncture, store at room temperature and use within 28 days. Always use a sterile needle for each withdrawal to maintain the bacteriostatic integrity. Inspect for particulate matter or discoloration before each use — discard if the solution is not clear and colorless.
What quality testing is performed on Bacteriostatic Water?
Each lot is tested for sterility (USP <71>), bacterial endotoxin levels (USP <85>), benzyl alcohol concentration verification (0.9% target), pH (4.5-7.0), particulate matter (USP <788>), and total organic carbon. The water meets USP standards for Water for Injection with the addition of the benzyl alcohol preservative. A Certificate of Analysis (COA) documenting all test results is available.

Research Use Only. This product is not intended for human consumption, therapeutic use, or diagnostic purposes. All peptides sold by Elyte Peptides are strictly for in-vitro research and laboratory use. By purchasing, you agree to use this product in compliance with all applicable laws and regulations.