All products are for laboratory research purposes only. Not for human consumption.
Sterile water containing a bacteriostatic preservative, used to reconstitute lyophilised research material
Bacteriostatic Water
Bacteriostatic water is sterile water containing a bacteriostatic preservative, used to reconstitute lyophilised peptides into solution. The preservative is what separates it from plain sterile water: it inhibits bacterial growth, which is why a reconstituted vial can be drawn from more than once rather than discarded after a single use. Supplied in sealed vials, boxed in tens, for laboratory research use only. This is a consumable rather than a peptide - there is no purity assay to report on it, and none is claimed.
$9.00 (£7.11) per box of 10 vials · 10 mL, 3 mL
Select size
Boxes
- Sold in boxes of 10 vials. No minimum order and no trade account.
- Dispatched in 1–2 working days, tracked to the UK, USA, EU and worldwide.
- Batch-specific Certificate of Analysis from Janoshik or Freedom Diagnostic in every box.
- Photographed before it ships, so you see the exact order that leaves us.
Overview
What is Bacteriostatic Water?
Bacteriostatic water is sterile water containing a bacteriostatic preservative, used to reconstitute lyophilised peptides into solution. The preservative is what separates it from plain sterile water: it inhibits bacterial growth, which is why a reconstituted vial can be drawn from more than once rather than discarded after a single use. Supplied in sealed vials, boxed in tens, for laboratory research use only. This is a consumable rather than a peptide - there is no purity assay to report on it, and none is claimed.
Bacteriostatic Water at a glance
| Compound | Bacteriostatic Water |
|---|---|
| Also known as | Bac water, BAC water, bac-water, bacteriostatic water for reconstitution, reconstitution water |
| Classification | Sterile water containing a bacteriostatic preservative, used to reconstitute lyophilised research material |
| Physical form | Sterile solution |
| Available sizes | 10 mL, 3 mL |
| Box quantity | 10 vials |
| Price from | $0.90 per vial ($9.00 per box) |
| Research status | Bacteriostatic water is a solvent rather than a research compound, so there is nothing here to summarise in the way there is for a peptide: no mechanism, no trial history, no approval status of its own. What follows is the practical detail that affects the peptides it is used with. |
| Documentation | No COA — no peptide content to assay |
These are catalogue specifications. This item is a consumable rather than a research compound: there is no peptide in it to assay, so no purity figure is quoted and no Certificate of Analysis is issued.
We make no “third-party verified” claim for a batch unless the matching report is supplied with it. Ask for the current COA for the lot in stock before you order — we will send it.
Pricing
How much does Bacteriostatic Water cost?
Bacteriostatic Water starts at $0.90 per vial (£0.71), sold in boxes of 10 at $9.00. One box is the smallest order and there is no trade account or minimum spend. Larger volumes are negotiable.
| Strength | Per vial | Box of 10 |
|---|---|---|
| 10 mL | $1.20 £0.95 | $12.00 £9.48 |
| 3 mL | $0.90 £0.71 | $9.00 £7.11 |
What to check before ordering, and what UK dispatch changes: buying bacteriostatic water in the UK.
Handling
How should Bacteriostatic Water be stored and reconstituted?
Sealed vials tolerate ambient temperature in transit and keep at −20 °C beyond that. Reconstitute slowly down the vial wall, swirl rather than shake, then refrigerate at 2–8 °C and aliquot before freezing.
Why each of those matters, and what a freeze–thaw cycle actually costs: peptide handling and storage reference.
Research Context
What is Bacteriostatic Water researched for?
Below is a plain-English summary of what published research has investigated, and what it has found. These are descriptions of research activity and published results. They are not claims about what Bacteriostatic Water does, and nothing here is a statement that it is safe or effective for any purpose.
Why the preservative matters
A lyophilised peptide vial usually holds far more material than a single experiment needs. Reconstituting with plain sterile water means that vial has to be used at once or discarded, because nothing in the solution stops bacterial growth. A bacteriostatic agent inhibits it, which is what allows the same vial to be drawn from repeatedly over a period of days.
Working out how much to add
The solvent volume sets the concentration, and the concentration sets every draw afterwards. Adding 2 mL to a 10 mg vial gives 5 mg per mL; adding 1 mL to the same vial gives 10 mg per mL. Our peptide calculator does that arithmetic and shows where the resulting volume falls on a 50-unit, 100-unit, 1 mL or 3 mL syringe barrel.
Storage
Store unopened vials as supplied. Once a peptide has been reconstituted it is the solution that needs care rather than the solvent - kept cold, protected from light, and not repeatedly frozen and thawed. The handling and storage reference covers what a freeze-thaw cycle actually costs.
Applications
Where Bacteriostatic Water is used in the laboratory
- Reconstituting lyophilised peptides for in vitro work, where one vial is drawn from across several sessions rather than all at once
- Preparing stock solutions at a known concentration, where the vial strength and the solvent volume together fix the mg per mL
- Diluting an existing stock down to a lower working concentration
- General bench use wherever a preserved aqueous solvent is called for rather than a single-use sterile one
Questions
Bacteriostatic Water questions, answered
What is the difference between bacteriostatic water and sterile water?
The preservative, and nothing else. Sterile water is water and nothing more, intended for a single draw: once the seal is broken it has no defence against contamination. Bacteriostatic water carries an agent that inhibits bacterial growth, so the same vial can be entered repeatedly. That is the whole distinction, and it is why bacteriostatic water is the usual choice for a multi-milligram peptide vial that will be drawn from over days rather than minutes.
How much does Bacteriostatic Water cost?
Bacteriostatic Water starts at $0.90 per vial, sold in boxes of 10 vials at $9.00 per box (about £7.11). 2 strengths available: 10 mL, 3 mL. There is no minimum order.
How is Bacteriostatic Water shipped?
Tracked, in plain packaging, dispatched within 1–2 working days. Country-by-country estimates are on the shipping page.
