WA3 WA10 BAC water, antibacterial water, 7732-18-5 benzyl alcohol peptide reconstitution solvent, for research use only.

1. Overview of BAC Antibacterial Water

BAC, or antibacterial water, is a high-standard sterile solvent widely used in biochemical laboratories worldwide, particularly suitable for the reconstitution, dilution, and long-term storage of lyophilized synthetic peptides, biological reagents, and water-soluble experimental compounds. Unlike ordinary water for injection or purified water, BAC water uses a scientifically formulated complex containing purified sterile water and a low concentration of antibacterial agent, giving it unique antibacterial properties, excellent solution stability, cell-active fragments, and making it a universal supporting solvent for various mainstream research peptides (such as lyophilized biochemical powders).

This product consists of two core components that meet United States Pharmacopeia (USP) standards: high-purity sterile distilled water and 0.9% benzyl alcohol. As a complex solution, BAC water does not have a single CAS number; the CAS numbers for its core components are water (7732-18-5) and benzyl alcohol (100-51-6). BAC water is produced in a strictly Class 100 sterile workshop, undergoing multi-stage purification, autoclaving, and sterile filtration processes. It features zero pyrogens, low endotoxins, stable pH, and extremely high biocompatibility, effectively avoiding experimental errors caused by solvent impurities, microbial contamination, and liquid deterioration.

Qualified BAC water is clear and transparent in appearance, free of suspended particles, turbidity, or odor. Its pH value is stably maintained between 5.4 and 6.0, creating a mild isotonic environment that meets the physiological tolerance requirements of cell experiments and animal model experiments. Its stable physicochemical properties make it an ideal choice for long-term cyclical laboratory experiments, especially suitable for research scenarios requiring repeated sampling and continuous observation.

2. Core Formula Principle and Antibacterial Mechanism

Compared to ordinary sterile water, the greatest functional advantage of BAC water lies in its long-lasting antibacterial protection mechanism. Ordinary sterile water is completely sterile before opening, but once the cap is punctured, air enters, and bacteria, mold, and microorganisms in the air will rapidly multiply in the pure water environment. Furthermore, proteases secreted by microorganisms will degrade bioactive substances such as peptides, causing experimental samples to rapidly lose their activity within a day. This deficiency means that ordinary sterile water is only suitable for single use and cannot support long-term experimental projects.

BAC water perfectly solves this problem by adding 0.9% benzyl alcohol. Benzyl alcohol is a safe and highly effective antibacterial ingredient that meets international biochemical industry standards. Benzyl alcohol can penetrate microbial cell membranes, inhibit the activity of microbial metabolic enzymes, and block bacterial protein synthesis and cell division, thereby effectively inhibiting the reproduction of bacteria, fungi, and other microorganisms in the solvent. This antibacterial effect is mild and targeted, inhibiting only microbial growth without damaging the molecular structure of bioactive substances or causing cytotoxicity to experimental cells and animal tissues.

The 0.9% concentration is the optimal balance value verified by extensive experimental data. Too low a concentration cannot achieve a long-term antibacterial effect, while too high a concentration can cause slight denaturation of peptide chains, affecting the solubility and activity of high-precision biochemical samples, thus interfering with the accuracy of experimental data. BAC water's standardized formulation ensures that the solvent remains stable and sterile for up to 28 days after opening under standard aseptic conditions, significantly extending the lifespan of laboratory solvents and ensuring the continuity of experiments.

3. Key Functional Advantages in Biochemical Experiments

3.1 Maintaining Long-Term Stability of Peptide Solutions

The core function of BAC water is to assist in the stable dissolution of peptide solutions.