What Bacteriostatic Water Is

Bacteriostatic water is sterile water containing 0.9% benzyl alcohol — a preservative that inhibits bacterial growth and allows a single sealed vial to be drawn from multiple times during a research workflow.

Lyophilised (freeze-dried) research peptides arrive as a solid powder and must be reconstituted into solution before use. Bacteriostatic water is the standard diluent for this. The 0.9% benzyl alcohol is what separates it from plain sterile water: because it suppresses microbial growth, a sealed vial remains usable across a multi-day research protocol rather than being single-use once opened.

This is why bacteriostatic water is the diluent referenced throughout published peptide reconstitution literature, and the default solvent stocked in most research settings alongside the peptides themselves.

For researchers in Thailand, sourcing it locally means it arrives with your peptides in a single tracked shipment — no separate international order, no customs delay on the one item you need before any research can begin.

Bacteriostatic vs Sterile vs Saline Water

Three water types appear in reconstitution research. The differences come down to preservative and reuse.

For multi-use peptide reconstitution, bacteriostatic water is the standard choice — which is why it is stocked alongside every peptide in the Bangkok Peptides range.

How to Reconstitute Peptides with Bacteriostatic Water

Reconstitution is straightforward and follows standard laboratory handling procedures.

1. Draw the diluent. Use the peptide reconstitution calculator to work out the exact volume of bacteriostatic water needed for your target concentration, then draw it into a sterile syringe.

2. Add it slowly. Inject the water down the inside wall of the peptide vial — not directly onto the lyophilised powder — to avoid disturbing the peptide.

3. Dissolve gently. Swirl gently until fully dissolved; do not shake. The reconstituted solution should appear clear. Store reconstituted peptide solutions refrigerated at 2–8°C.

Why Source Bacteriostatic Water Locally in Thailand

Ordering bacteriostatic water from overseas introduces customs delays and freight uncertainty on the one consumable you need before any peptide research can start. Sourcing locally removes that. Bangkok Peptides holds stock in Bangkok, ships from Bangkok, and delivers across Thailand on tracked services — order it alongside your peptides and receive everything together, in days rather than weeks.

Delivery Across Thailand

Bangkok Peptides delivers bacteriostatic water nationwide via tracked courier. Most orders qualify for same-day or next-working-day dispatch from our Bangkok facility, with delivery windows depending on destination region.

Storage & Handling

Bacteriostatic water is stored at room temperature, away from direct light, and does not require refrigeration prior to opening. Once the seal is broken, follow standard clean-lab handling and aseptic technique throughout.

Because the 0.9% benzyl alcohol preservative suppresses microbial growth, a sealed vial can be accessed multiple times across a research protocol — one of the main practical reasons it is preferred over plain sterile water for peptide reconstitution.

Frequently Asked Questions