Bacteriostatic Water
For research use onlySterile water for reconstitution, preserved with 0.9% benzyl alcohol.
Volume (mL)
Quantity
before 1:00 PM CT
money-back
on orders $50+
A preserved sterile diluent. Bacteriostatic Water is sterile water containing 0.9% benzyl alcohol, a preservative that inhibits bacterial growth in the vial between withdrawals. That single ingredient is the whole distinction: plain sterile water has no preservative, so once its seal is broken the contents are treated as single-use, while a preserved vial can be drawn from repeatedly across a working period. It is a diluent, not a research compound in its own right.
The two are easy to confuse and are not interchangeable in a protocol that assumes one or the other:
| Property | Sterile water | Bacteriostatic water (as supplied) |
|---|---|---|
| Preservative | None | Benzyl alcohol, 0.9% |
| Vial use | Single withdrawal | Multi-dose |
| Sterile at fill | Yes | Yes |
| Supplied form | – | 10 mL rubber-stoppered vial |
Brightly stocks it because the lyophilized materials in this catalog are supplied dry and have to be reconstituted before any laboratory work begins. It is sold standalone and is never bundled with a vial of research material.
Supplied strictly as a characterised reference material for in-vitro and preclinical laboratory work, not for any diagnostic or therapeutic purpose.
| Composition | Sterile water with 0.9% benzyl alcohol |
|---|---|
| Grade | USP grade |
| Preservative | Benzyl alcohol (bacteriostatic) |
| Form | Clear, sterile solution |
| Quantity | 10 mL per vial |
| Vial | Multi-dose, rubber-stoppered |
| Use | Diluent for reconstituting lyophilized research materials |
| Documentation | Lot documentation on request; not assayed by HPLC |
| Storage | Room temperature; refrigerate after first use |
| Application | Research use only |
Laboratory use
Every peptide and compound in the Brightly catalog is supplied lyophilized, as a dry powder in a sealed vial. Nothing can be measured, diluted, or applied in that state, so reconstitution is the first step of any protocol built around them. Bacteriostatic water is the diluent that step normally calls for.
Why a preserved diluent
A single vial of research material is usually worked through over days or weeks rather than in one sitting. The benzyl alcohol in a bacteriostatic vial inhibits bacterial growth between withdrawals, which is what makes repeated access to the same vial reasonable in a controlled laboratory setting. Unpreserved sterile water offers no such margin once its seal is broken.
Points researchers weigh
- Preserved (multi-dose) versus unpreserved (single-withdrawal) diluent
- Compatibility of benzyl alcohol with the assay or model in use
- Working concentration and the aliquot volumes a protocol needs
- Stability of the reconstituted material under the storage conditions available
- Refrigeration and shelf life after the vial is first opened
Brightly performs no reconstitution and provides no protocols, volumes, or concentrations. Choice of diluent, working concentration, and handling are entirely a matter for your own laboratory procedure.
Supplied strictly as a characterised reference material for in-vitro and preclinical laboratory work, not for any diagnostic or therapeutic purpose.
Bacteriostatic Water is produced to pharmaceutical fill-finish standards. It is a diluent rather than a characterised research compound, so it is documented differently from the rest of the catalog.
- USP-grade inputs
- Water for injection and benzyl alcohol, both to USP specification.
- Sterile-filtered
- Filtered through a validated sterilising filter before filling.
- Aseptic fill
- Filled and stoppered under controlled aseptic conditions.
- Sealed multi-dose vial
- Rubber-stoppered and crimp-sealed so the vial can be drawn from more than once.
- Preserved at 0.9%
- Benzyl alcohol at 0.9%, the concentration that makes the vial bacteriostatic.
- Lot documentation
- Available on request. Bacteriostatic water is not assayed by HPLC and does not ship with a Certificate of Analysis — those are peptide identity and purity tests, and there is no peptide here to test.
Before first use. Store the sealed vial at room temperature in a cool, dry place away from heat and direct light. It does not need refrigeration while unopened.
After first use. Once the stopper has been punctured, refrigerate the vial and keep it stoppered. The benzyl alcohol inhibits bacterial growth but does not make the vial indefinitely stable; discard it at the end of the working period your own laboratory protocol specifies.
Do not freeze. Unlike the lyophilized materials it reconstitutes, this is a solution, and freezing it serves no purpose. Discard any vial that is cloudy, discoloured, or has visible particulates rather than using it.
- Same-day dispatch (USA)
- In-stock orders placed before 1:00 PM CT ship the same business day.
- Fast domestic delivery
- Free FedEx shipping on every order; express delivery is free on orders over $150.
- Protective handling
- Vials are held in temperature-controlled storage before shipment; the lyophilized powder is stable for ambient transit and is packed to limit temperature swings, moisture, and physical damage.
- Tracking and guarantee
- Tracking is provided at shipment, and every order is backed by our 30-day money-back guarantee.
For research use only. Not for human or animal consumption.
