24 Hour Shipping | Free Shipping over $150
Every lot third-party tested · COA matched to your vial View all products
Catalog / Supplies / Kylo H₂O
Laboratory Supply

Kylo H₂O 10mL

BAC Water · Sterile Diluent · 0.9% Benzyl Alcohol

Sterile, non-pyrogenic water containing 0.9% benzyl alcohol as a preservative, supplied in multi-dose vials for reconstituting lyophilized research peptides in the laboratory.

Size
Shipping protection 30-day money back 24-hour dispatch

Product information

Composition & handling
What it is

What is bacteriostatic water?

A reconstitution solvent, not an active compound. It is purified sterile water with a small amount of benzyl alcohol added, and that preservative is what lets a vial be entered repeatedly over several weeks without microbial growth, which plain sterile water cannot do.

Reconstitution solventMulti useResearch grade
ClassAqueous diluent / solvent
PreservativeBenzyl alcohol 0.9% (9 mg/mL)
FormSterile liquid, multi-dose vial
UseResearch use only
Composition profile

What's in the vial

BasePurified sterile water (H2O)
PreservativeBenzyl alcohol, 0.9% (9 mg/mL)
pH5.7 (range 4.5 to 7.0)
SterilitySterile, non-pyrogenic
ContainerMulti-dose vial
In-use windowUp to 28 days after first puncture
Storage requirements

Handling information

Room temperatureProtect from contaminationKeep sealed
Unopened
Store at 15 to 25 °C
After first puncture
Up to 28 days with aseptic handling
Overview

Product overview

A sterile, preservative-containing diluent supplied for multi-dose reconstitution of lyophilized research compounds.

Technical overview

Bacteriostatic water is purified, sterile water containing 0.9% benzyl alcohol, with no other additives in the standard preparation. The benzyl alcohol inhibits bacterial and fungal growth, so a single vial can be drawn from repeatedly over roughly four weeks.

Its pH sits near 5.7, a range compatible with most research peptides, and it is supplied sterile and non-pyrogenic in a sealed multi-dose vial.

Research applications

Bacteriostatic water is the standard diluent for dissolving lyophilized peptides and proteins ahead of laboratory work. It suits any multi-session protocol where a reconstituted vial is accessed more than once, since the preservative keeps the solution usable between withdrawals. For single-session, same-day use, preservative-free sterile water is the alternative.

For Research Use Only · Not for human or veterinary use

Kylo Peptides supplies this product as a reference material for scientific inquiry. All applications must be conducted by qualified professionals in controlled laboratory environments. It has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease.

FAQ

Frequently Asked Questions About Bacteriostatic Water

The preservative. Bacteriostatic water contains 0.9% benzyl alcohol, which suppresses microbial growth and allows a vial to be entered many times over about 28 days. Sterile water has no preservative and is meant for a single use, so the two are not interchangeable when a protocol calls for repeated access.

It acts as the bacteriostatic agent. At 0.9%, benzyl alcohol is enough to hold back most bacteria and fungi across repeated punctures, yet low enough that it does not disrupt the chemical activity of the majority of research peptides at normal working dilutions. That balance is what makes it the default reconstitution solvent.

Up to 28 days when handled aseptically. The preservative extends the usable window well beyond that of plain sterile water, though the actual stability of whatever has been dissolved depends on the specific peptide. A practical habit is to write the puncture date on the vial at first use.

Unopened vials should sit at controlled room temperature, roughly 15 to 25 °C, and should be kept away from temperature extremes. Once a vial has been punctured, continue to protect it from contamination and observe the 28-day in-use limit. Discard any vial that looks discolored or shows particles.

Nearly all, but not quite every one. The vast majority of research peptides reconstitute cleanly in it without any loss of activity. A small number of especially sensitive sequences can react to benzyl alcohol even at low levels, and for those the reagent's datasheet will usually recommend a preservative-free alternative. Confirm compatibility before dissolving.

No. Kylo supplies bacteriostatic water for in vitro laboratory research only. It is not intended or labeled for human or veterinary use, and it is provided solely to qualified researchers as a diluent for controlled experimental work.

Backed By Quality Standards

Every batch of bacteriostatic water is prepared sterile and non-pyrogenic to research-grade standards.

Shop catalog →