Name: BAC. WATER（Contains benzyl alcohol）
Brand: U-PEPTIDE
SKU: BA10
Rating: 5 (1 reviews)

Description

What Is BAC. WATER?

BAC WATER, short for bacteriostatic water, is a precisely formulated sterile aqueous solution primarily used in pharmaceutical and research settings for reconstituting lyophilized (freeze-dried) compounds like peptides, hormones, and injectable drugs. Its core composition is sterile water for injection (WFI) with 0.9% benzyl alcohol added as a bacteriostatic agent—this key additive inhibits bacterial growth, making it suitable for repeated use after the vial is first opened.

How It Works?

Sterile dilution foundation: Acts as a neutral, pyrogen-free solvent to reconstitute lyophilized (freeze-dried) peptides, hormones, or injectable drugs—dissolving dry compounds into a homogeneous, injectable solution without altering their chemical structure or potency.
Bacteriostatic preservation via benzyl alcohol: The 0.9% benzyl alcohol additive inhibits bacterial growth by disrupting microbial cell membranes and metabolic processes (e.g., protein synthesis), preventing contamination of the solution after the vial is opened.
Enables multi-dose use: Unlike preservative-free sterile water (prone to rapid bacterial growth), the bacteriostatic effect extends the solution’s stability to 28 days post-opening (when refrigerated), allowing repeated withdrawals for multiple injections.
Compatibility with sensitive compounds: Neutral pH (≈7.0) and inert composition (no electrolytes/additives) avoid chemical reactions with peptides, proteins, or hormones—preserving their bioactivity during reconstitution and storage.

The difference between BAC Water (Bacteriostatic Water) and Acetic Acid Water (Acetic Acid Dilution)：

Aspect	BAC Water (Bacteriostatic Water)	Acetic Acid Water (Acetic Acid Dilution)
Primary Purpose	Reconstitute lyophilized peptides/hormones for multi-dose use (preserves solution sterility).	- Sterile water + dilute acetic acid (typically 0.1–1% concentration) - No preservatives.
Key Composition	- 99.1% sterile pyrogen-free water - 0.9% benzyl alcohol (preservative).	- Sterile water + dilute acetic acid (typically 0.1–1% concentration) - No preservatives.
Core Function	1. Dilutes dry compounds into injectable solutions 2. Inhibits bacterial growth (enables 28-day post-opening use).	1. Lowers pH (acidic environment) to solubilize hydrophobic peptides 2. No preservation—only aids dissolution.
Peptide Compatibility	Ideal for hydrophilic peptides (soluble in neutral water: e.g., GHRP-6, Melanotan II).	Required for hydrophobic peptides (insoluble in neutral water: e.g., some growth hormone fragments, cyclic peptides).
Sterility & Shelf Life	- Unopened: 36 months - Opened: 28 days (refrigerated, due to benzyl alcohol).	- Unopened: 12–24 months (depends on concentration) - Opened: Use immediately (≤24 hours) — no preservative, high risk of bacterial growth.
pH Level	Neutral (≈7.0) — compatible with most peptide structures.	Acidic (≈2.0–4.0) — may degrade acid-labile peptides (avoid for sensitive compounds).
Safety & Use Notes	- Not for direct injection (only as diluent) - Benzyl alcohol is safe at low doses; avoid high-volume use in infants.	- Must be neutralized (e.g., with sodium acetate) before injection (acidic pH causes tissue irritation) - Corrosive in high concentrations; handle with care.
Typical Application	Routine peptide reconstitution (e.g., fitness, research use for hydrophilic compounds).	Specialized reconstitution of hydrophobic peptides (e.g., research-grade peptides with poor water solubility).

Critical Takeaways for Practical Use:

Choose BAC Water if: You’re working with hydrophilic peptides and need repeated doses (e.g., daily injections over weeks) — the preservative ensures safety, and neutral pH protects peptide stability.
Choose Acetic Acid Water if: Your peptide is hydrophobic (won’t dissolve in neutral water) — the acid breaks down hydrophobic bonds, but use immediately and neutralize before injection to avoid irritation.
Never substitute: BAC Water can’t solubilize hydrophobic peptides, and Acetic Acid Water can’t preserve solutions (risk of contamination if stored) — match the diluent to the peptide’s solubility and your use case (single vs. multi-dose).

Why Choose Us?

High-purity peptide synthesis
Full quality documentation (COA, HPLC, MS)
OEM/ODM private label support
Reliable global delivery
Stable bulk supply for distributors